Home / 57,387.42-86,029.29-20,442.78

Finding the Fourth Proportional to 57,387.42, 86,029.29 and 20,442.78

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Solution

The fourth proportional to 57,387.42, 86,029.29 and 20,442.78 is: 30,645.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,387.42 : 86,029.29 = 20,442.78 : x
  2. Step 2: Convert to fraction form
    57,387.42/86,029.29 = 20,442.78/x
  3. Step 3: Cross multiply
    57,387.42x = 86,029.29 × 20,442.78
  4. Step 4: Simplify right side
    57,387.42x = 1,758,677,849.03
  5. Step 5: Solve for x
    x = 1,758,677,849.03/57,387.42
  6. Step 6: Final answer
    x = 30,645.70

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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.