Home / 38,677.40-57,939.30-21,115.80

Finding the Fourth Proportional to 38,677.40, 57,939.30 and 21,115.80

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Solution

The fourth proportional to 38,677.40, 57,939.30 and 21,115.80 is: 31,631.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,677.40 : 57,939.30 = 21,115.80 : x
  2. Step 2: Convert to fraction form
    38,677.40/57,939.30 = 21,115.80/x
  3. Step 3: Cross multiply
    38,677.40x = 57,939.30 × 21,115.80
  4. Step 4: Simplify right side
    38,677.40x = 1,223,434,670.94
  5. Step 5: Solve for x
    x = 1,223,434,670.94/38,677.40
  6. Step 6: Final answer
    x = 31,631.77

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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.