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Finding the Fourth Proportional to 15,754.29, 21,741.32 and 8,680.71

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Solution

The fourth proportional to 15,754.29, 21,741.32 and 8,680.71 is: 11,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,754.29 : 21,741.32 = 8,680.71 : x
  2. Step 2: Convert to fraction form
    15,754.29/21,741.32 = 8,680.71/x
  3. Step 3: Cross multiply
    15,754.29x = 21,741.32 × 8,680.71
  4. Step 4: Simplify right side
    15,754.29x = 188,730,050.53
  5. Step 5: Solve for x
    x = 188,730,050.53/15,754.29
  6. Step 6: Final answer
    x = 11,979.60

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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.