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Finding the Fourth Proportional to 22,611.31, 31,203.69 and 12,540.68

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Solution

The fourth proportional to 22,611.31, 31,203.69 and 12,540.68 is: 17,306.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,611.31 : 31,203.69 = 12,540.68 : x
  2. Step 2: Convert to fraction form
    22,611.31/31,203.69 = 12,540.68/x
  3. Step 3: Cross multiply
    22,611.31x = 31,203.69 × 12,540.68
  4. Step 4: Simplify right side
    22,611.31x = 391,315,569.12
  5. Step 5: Solve for x
    x = 391,315,569.12/22,611.31
  6. Step 6: Final answer
    x = 17,306.19

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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.