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Finding the Fourth Proportional to 29,555.68, 40,793.52 and 20,128

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Solution

The fourth proportional to 29,555.68, 40,793.52 and 20,128 is: 27,781.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,555.68 : 40,793.52 = 20,128 : x
  2. Step 2: Convert to fraction form
    29,555.68/40,793.52 = 20,128/x
  3. Step 3: Cross multiply
    29,555.68x = 40,793.52 × 20,128
  4. Step 4: Simplify right side
    29,555.68x = 821,091,970.56
  5. Step 5: Solve for x
    x = 821,091,970.56/29,555.68
  6. Step 6: Final answer
    x = 27,781.19

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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.