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Finding the Fourth Proportional to 28,311.70, 42,472.16 and 10,542.43

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Solution

The fourth proportional to 28,311.70, 42,472.16 and 10,542.43 is: 15,815.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.70 : 42,472.16 = 10,542.43 : x
  2. Step 2: Convert to fraction form
    28,311.70/42,472.16 = 10,542.43/x
  3. Step 3: Cross multiply
    28,311.70x = 42,472.16 × 10,542.43
  4. Step 4: Simplify right side
    28,311.70x = 447,759,508.68
  5. Step 5: Solve for x
    x = 447,759,508.68/28,311.70
  6. Step 6: Final answer
    x = 15,815.35

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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.