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Finding the Fourth Proportional to 15,407.86, 21,262.88 and 8,334.29

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Solution

The fourth proportional to 15,407.86, 21,262.88 and 8,334.29 is: 11,501.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,407.86 : 21,262.88 = 8,334.29 : x
  2. Step 2: Convert to fraction form
    15,407.86/21,262.88 = 8,334.29/x
  3. Step 3: Cross multiply
    15,407.86x = 21,262.88 × 8,334.29
  4. Step 4: Simplify right side
    15,407.86x = 177,211,008.16
  5. Step 5: Solve for x
    x = 177,211,008.16/15,407.86
  6. Step 6: Final answer
    x = 11,501.34

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Double scale
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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.