Home / 21,306.74-29,400.45-12,921.62

Finding the Fourth Proportional to 21,306.74, 29,400.45 and 12,921.62

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Solution

The fourth proportional to 21,306.74, 29,400.45 and 12,921.62 is: 17,830.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.74 : 29,400.45 = 12,921.62 : x
  2. Step 2: Convert to fraction form
    21,306.74/29,400.45 = 12,921.62/x
  3. Step 3: Cross multiply
    21,306.74x = 29,400.45 × 12,921.62
  4. Step 4: Simplify right side
    21,306.74x = 379,901,442.73
  5. Step 5: Solve for x
    x = 379,901,442.73/21,306.74
  6. Step 6: Final answer
    x = 17,830.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.