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Finding the Fourth Proportional to 18,461.88, 25,489.62 and 11,398.68

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Solution

The fourth proportional to 18,461.88, 25,489.62 and 11,398.68 is: 15,737.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.88 : 25,489.62 = 11,398.68 : x
  2. Step 2: Convert to fraction form
    18,461.88/25,489.62 = 11,398.68/x
  3. Step 3: Cross multiply
    18,461.88x = 25,489.62 × 11,398.68
  4. Step 4: Simplify right side
    18,461.88x = 290,548,021.70
  5. Step 5: Solve for x
    x = 290,548,021.70/18,461.88
  6. Step 6: Final answer
    x = 15,737.73

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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.