Home / 18,439.88-25,443.22-10,781.68

Finding the Fourth Proportional to 18,439.88, 25,443.22 and 10,781.68

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Solution

The fourth proportional to 18,439.88, 25,443.22 and 10,781.68 is: 14,876.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.88 : 25,443.22 = 10,781.68 : x
  2. Step 2: Convert to fraction form
    18,439.88/25,443.22 = 10,781.68/x
  3. Step 3: Cross multiply
    18,439.88x = 25,443.22 × 10,781.68
  4. Step 4: Simplify right side
    18,439.88x = 274,320,663.89
  5. Step 5: Solve for x
    x = 274,320,663.89/18,439.88
  6. Step 6: Final answer
    x = 14,876.49

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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.