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Finding the Fourth Proportional to 38,890.80, 58,249.80 and 31,978.80

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Solution

The fourth proportional to 38,890.80, 58,249.80 and 31,978.80 is: 47,897.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,890.80 : 58,249.80 = 31,978.80 : x
  2. Step 2: Convert to fraction form
    38,890.80/58,249.80 = 31,978.80/x
  3. Step 3: Cross multiply
    38,890.80x = 58,249.80 × 31,978.80
  4. Step 4: Simplify right side
    38,890.80x = 1,862,758,704.24
  5. Step 5: Solve for x
    x = 1,862,758,704.24/38,890.80
  6. Step 6: Final answer
    x = 47,897.16

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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.