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Finding the Fourth Proportional to 18,424.62, 25,424.82 and 10,871.28

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Solution

The fourth proportional to 18,424.62, 25,424.82 and 10,871.28 is: 15,001.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,424.62 : 25,424.82 = 10,871.28 : x
  2. Step 2: Convert to fraction form
    18,424.62/25,424.82 = 10,871.28/x
  3. Step 3: Cross multiply
    18,424.62x = 25,424.82 × 10,871.28
  4. Step 4: Simplify right side
    18,424.62x = 276,400,337.17
  5. Step 5: Solve for x
    x = 276,400,337.17/18,424.62
  6. Step 6: Final answer
    x = 15,001.68

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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.