Home / 21,385.49-29,506.92-12,427.90

Finding the Fourth Proportional to 21,385.49, 29,506.92 and 12,427.90

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Solution

The fourth proportional to 21,385.49, 29,506.92 and 12,427.90 is: 17,147.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.49 : 29,506.92 = 12,427.90 : x
  2. Step 2: Convert to fraction form
    21,385.49/29,506.92 = 12,427.90/x
  3. Step 3: Cross multiply
    21,385.49x = 29,506.92 × 12,427.90
  4. Step 4: Simplify right side
    21,385.49x = 366,708,930.70
  5. Step 5: Solve for x
    x = 366,708,930.70/21,385.49
  6. Step 6: Final answer
    x = 17,147.56

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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.