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Finding the Fourth Proportional to 38,687.80, 58,034.40 and 15,311.20

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Solution

The fourth proportional to 38,687.80, 58,034.40 and 15,311.20 is: 22,967.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,687.80 : 58,034.40 = 15,311.20 : x
  2. Step 2: Convert to fraction form
    38,687.80/58,034.40 = 15,311.20/x
  3. Step 3: Cross multiply
    38,687.80x = 58,034.40 × 15,311.20
  4. Step 4: Simplify right side
    38,687.80x = 888,576,305.28
  5. Step 5: Solve for x
    x = 888,576,305.28/38,687.80
  6. Step 6: Final answer
    x = 22,967.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.