Home / 21,490.92-29,657.88-12,540.96

Finding the Fourth Proportional to 21,490.92, 29,657.88 and 12,540.96

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Solution

The fourth proportional to 21,490.92, 29,657.88 and 12,540.96 is: 17,306.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.92 : 29,657.88 = 12,540.96 : x
  2. Step 2: Convert to fraction form
    21,490.92/29,657.88 = 12,540.96/x
  3. Step 3: Cross multiply
    21,490.92x = 29,657.88 × 12,540.96
  4. Step 4: Simplify right side
    21,490.92x = 371,938,286.76
  5. Step 5: Solve for x
    x = 371,938,286.76/21,490.92
  6. Step 6: Final answer
    x = 17,306.76

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1.5x scale

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.