Home / 19,930.40-29,862.72-12,115.52

Finding the Fourth Proportional to 19,930.40, 29,862.72 and 12,115.52

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Solution

The fourth proportional to 19,930.40, 29,862.72 and 12,115.52 is: 18,153.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.40 : 29,862.72 = 12,115.52 : x
  2. Step 2: Convert to fraction form
    19,930.40/29,862.72 = 12,115.52/x
  3. Step 3: Cross multiply
    19,930.40x = 29,862.72 × 12,115.52
  4. Step 4: Simplify right side
    19,930.40x = 361,802,381.41
  5. Step 5: Solve for x
    x = 361,802,381.41/19,930.40
  6. Step 6: Final answer
    x = 18,153.29

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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.