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Finding the Fourth Proportional to 18,781.97, 25,919.15 and 10,824.26

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Solution

The fourth proportional to 18,781.97, 25,919.15 and 10,824.26 is: 14,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.97 : 25,919.15 = 10,824.26 : x
  2. Step 2: Convert to fraction form
    18,781.97/25,919.15 = 10,824.26/x
  3. Step 3: Cross multiply
    18,781.97x = 25,919.15 × 10,824.26
  4. Step 4: Simplify right side
    18,781.97x = 280,555,434.86
  5. Step 5: Solve for x
    x = 280,555,434.86/18,781.97
  6. Step 6: Final answer
    x = 14,937.49

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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.