Home / 21,490.66-29,654.46-12,540.34

Finding the Fourth Proportional to 21,490.66, 29,654.46 and 12,540.34

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Solution

The fourth proportional to 21,490.66, 29,654.46 and 12,540.34 is: 17,304.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.66 : 29,654.46 = 12,540.34 : x
  2. Step 2: Convert to fraction form
    21,490.66/29,654.46 = 12,540.34/x
  3. Step 3: Cross multiply
    21,490.66x = 29,654.46 × 12,540.34
  4. Step 4: Simplify right side
    21,490.66x = 371,877,010.92
  5. Step 5: Solve for x
    x = 371,877,010.92/21,490.66
  6. Step 6: Final answer
    x = 17,304.12

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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.