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Finding the Fourth Proportional to 39,477, 54,478.20 and 21,572.04

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Solution

The fourth proportional to 39,477, 54,478.20 and 21,572.04 is: 29,769.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,477 : 54,478.20 = 21,572.04 : x
  2. Step 2: Convert to fraction form
    39,477/54,478.20 = 21,572.04/x
  3. Step 3: Cross multiply
    39,477x = 54,478.20 × 21,572.04
  4. Step 4: Simplify right side
    39,477x = 1,175,205,909.53
  5. Step 5: Solve for x
    x = 1,175,205,909.53/39,477
  6. Step 6: Final answer
    x = 29,769.38

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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.