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Finding the Fourth Proportional to 15,010.52, 20,713.94 and 8,639.16

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Solution

The fourth proportional to 15,010.52, 20,713.94 and 8,639.16 is: 11,921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,010.52 : 20,713.94 = 8,639.16 : x
  2. Step 2: Convert to fraction form
    15,010.52/20,713.94 = 8,639.16/x
  3. Step 3: Cross multiply
    15,010.52x = 20,713.94 × 8,639.16
  4. Step 4: Simplify right side
    15,010.52x = 178,951,041.89
  5. Step 5: Solve for x
    x = 178,951,041.89/15,010.52
  6. Step 6: Final answer
    x = 11,921.71

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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.