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Finding the Fourth Proportional to 13,588.92, 18,751.80 and 7,619.64

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Solution

The fourth proportional to 13,588.92, 18,751.80 and 7,619.64 is: 10,514.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,588.92 : 18,751.80 = 7,619.64 : x
  2. Step 2: Convert to fraction form
    13,588.92/18,751.80 = 7,619.64/x
  3. Step 3: Cross multiply
    13,588.92x = 18,751.80 × 7,619.64
  4. Step 4: Simplify right side
    13,588.92x = 142,881,965.35
  5. Step 5: Solve for x
    x = 142,881,965.35/13,588.92
  6. Step 6: Final answer
    x = 10,514.59

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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.