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Finding the Fourth Proportional to 28,034.52, 38,687.40 and 15,459

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Solution

The fourth proportional to 28,034.52, 38,687.40 and 15,459 is: 21,333.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,034.52 : 38,687.40 = 15,459 : x
  2. Step 2: Convert to fraction form
    28,034.52/38,687.40 = 15,459/x
  3. Step 3: Cross multiply
    28,034.52x = 38,687.40 × 15,459
  4. Step 4: Simplify right side
    28,034.52x = 598,068,516.60
  5. Step 5: Solve for x
    x = 598,068,516.60/28,034.52
  6. Step 6: Final answer
    x = 21,333.29

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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.