Home / 19,938.40-29,972.40-14,135.20

Finding the Fourth Proportional to 19,938.40, 29,972.40 and 14,135.20

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Solution

The fourth proportional to 19,938.40, 29,972.40 and 14,135.20 is: 21,248.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.40 : 29,972.40 = 14,135.20 : x
  2. Step 2: Convert to fraction form
    19,938.40/29,972.40 = 14,135.20/x
  3. Step 3: Cross multiply
    19,938.40x = 29,972.40 × 14,135.20
  4. Step 4: Simplify right side
    19,938.40x = 423,665,868.48
  5. Step 5: Solve for x
    x = 423,665,868.48/19,938.40
  6. Step 6: Final answer
    x = 21,248.74

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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.