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Finding the Fourth Proportional to 22,959.64, 31,681.62 and 12,885.88

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Solution

The fourth proportional to 22,959.64, 31,681.62 and 12,885.88 is: 17,781.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,959.64 : 31,681.62 = 12,885.88 : x
  2. Step 2: Convert to fraction form
    22,959.64/31,681.62 = 12,885.88/x
  3. Step 3: Cross multiply
    22,959.64x = 31,681.62 × 12,885.88
  4. Step 4: Simplify right side
    22,959.64x = 408,245,553.53
  5. Step 5: Solve for x
    x = 408,245,553.53/22,959.64
  6. Step 6: Final answer
    x = 17,781.01

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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.