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Finding the Fourth Proportional to 18,439.74, 25,443.03 and 10,781.54

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Solution

The fourth proportional to 18,439.74, 25,443.03 and 10,781.54 is: 14,876.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.74 : 25,443.03 = 10,781.54 : x
  2. Step 2: Convert to fraction form
    18,439.74/25,443.03 = 10,781.54/x
  3. Step 3: Cross multiply
    18,439.74x = 25,443.03 × 10,781.54
  4. Step 4: Simplify right side
    18,439.74x = 274,314,973.43
  5. Step 5: Solve for x
    x = 274,314,973.43/18,439.74
  6. Step 6: Final answer
    x = 14,876.29

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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.