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Finding the Fourth Proportional to 29,646.80, 44,470.20 and 12,129.20

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Solution

The fourth proportional to 29,646.80, 44,470.20 and 12,129.20 is: 18,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,646.80 : 44,470.20 = 12,129.20 : x
  2. Step 2: Convert to fraction form
    29,646.80/44,470.20 = 12,129.20/x
  3. Step 3: Cross multiply
    29,646.80x = 44,470.20 × 12,129.20
  4. Step 4: Simplify right side
    29,646.80x = 539,387,949.84
  5. Step 5: Solve for x
    x = 539,387,949.84/29,646.80
  6. Step 6: Final answer
    x = 18,193.80

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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.