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Finding the Fourth Proportional to 38,489.60, 53,116.80 and 29,043.20

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Solution

The fourth proportional to 38,489.60, 53,116.80 and 29,043.20 is: 40,080.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,489.60 : 53,116.80 = 29,043.20 : x
  2. Step 2: Convert to fraction form
    38,489.60/53,116.80 = 29,043.20/x
  3. Step 3: Cross multiply
    38,489.60x = 53,116.80 × 29,043.20
  4. Step 4: Simplify right side
    38,489.60x = 1,542,681,845.76
  5. Step 5: Solve for x
    x = 1,542,681,845.76/38,489.60
  6. Step 6: Final answer
    x = 40,080.49

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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.