Home / 39,658.78-54,729.12-21,753.83

Finding the Fourth Proportional to 39,658.78, 54,729.12 and 21,753.83

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Solution

The fourth proportional to 39,658.78, 54,729.12 and 21,753.83 is: 30,020.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,658.78 : 54,729.12 = 21,753.83 : x
  2. Step 2: Convert to fraction form
    39,658.78/54,729.12 = 21,753.83/x
  3. Step 3: Cross multiply
    39,658.78x = 54,729.12 × 21,753.83
  4. Step 4: Simplify right side
    39,658.78x = 1,190,567,837.68
  5. Step 5: Solve for x
    x = 1,190,567,837.68/39,658.78
  6. Step 6: Final answer
    x = 30,020.28

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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.