Home / 38,702.80-57,981.30-19,918.90

Finding the Fourth Proportional to 38,702.80, 57,981.30 and 19,918.90

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Solution

The fourth proportional to 38,702.80, 57,981.30 and 19,918.90 is: 29,840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,702.80 : 57,981.30 = 19,918.90 : x
  2. Step 2: Convert to fraction form
    38,702.80/57,981.30 = 19,918.90/x
  3. Step 3: Cross multiply
    38,702.80x = 57,981.30 × 19,918.90
  4. Step 4: Simplify right side
    38,702.80x = 1,154,923,716.57
  5. Step 5: Solve for x
    x = 1,154,923,716.57/38,702.80
  6. Step 6: Final answer
    x = 29,840.83

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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.