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Finding the Fourth Proportional to 31,638.84, 43,659.84 and 17,490.78

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Solution

The fourth proportional to 31,638.84, 43,659.84 and 17,490.78 is: 24,136.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,638.84 : 43,659.84 = 17,490.78 : x
  2. Step 2: Convert to fraction form
    31,638.84/43,659.84 = 17,490.78/x
  3. Step 3: Cross multiply
    31,638.84x = 43,659.84 × 17,490.78
  4. Step 4: Simplify right side
    31,638.84x = 763,644,656.28
  5. Step 5: Solve for x
    x = 763,644,656.28/31,638.84
  6. Step 6: Final answer
    x = 24,136.30

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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.