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Finding the Fourth Proportional to 42,530.99, 63,806.02 and 12,951.15

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Solution

The fourth proportional to 42,530.99, 63,806.02 and 12,951.15 is: 19,429.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,530.99 : 63,806.02 = 12,951.15 : x
  2. Step 2: Convert to fraction form
    42,530.99/63,806.02 = 12,951.15/x
  3. Step 3: Cross multiply
    42,530.99x = 63,806.02 × 12,951.15
  4. Step 4: Simplify right side
    42,530.99x = 826,361,335.92
  5. Step 5: Solve for x
    x = 826,361,335.92/42,530.99
  6. Step 6: Final answer
    x = 19,429.63

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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.