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Finding the Fourth Proportional to 13,445.71, 18,555.54 and 7,477.63

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Solution

The fourth proportional to 13,445.71, 18,555.54 and 7,477.63 is: 10,319.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.71 : 18,555.54 = 7,477.63 : x
  2. Step 2: Convert to fraction form
    13,445.71/18,555.54 = 7,477.63/x
  3. Step 3: Cross multiply
    13,445.71x = 18,555.54 × 7,477.63
  4. Step 4: Simplify right side
    13,445.71x = 138,751,462.57
  5. Step 5: Solve for x
    x = 138,751,462.57/13,445.71
  6. Step 6: Final answer
    x = 10,319.39

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Find fourth proportional to 6,722.86, 9,277.77 and 3,738.82
Half scale
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Double scale
Find fourth proportional to 13,446.71, 18,556.92 and 7,478.63
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.