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Finding the Fourth Proportional to 42,479.92, 63,706.92 and 11,311.12

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Solution

The fourth proportional to 42,479.92, 63,706.92 and 11,311.12 is: 16,963.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,479.92 : 63,706.92 = 11,311.12 : x
  2. Step 2: Convert to fraction form
    42,479.92/63,706.92 = 11,311.12/x
  3. Step 3: Cross multiply
    42,479.92x = 63,706.92 × 11,311.12
  4. Step 4: Simplify right side
    42,479.92x = 720,596,616.95
  5. Step 5: Solve for x
    x = 720,596,616.95/42,479.92
  6. Step 6: Final answer
    x = 16,963.23

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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.