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Finding the Fourth Proportional to 18,423.68, 25,425.10 and 10,871.86

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Solution

The fourth proportional to 18,423.68, 25,425.10 and 10,871.86 is: 15,003.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.68 : 25,425.10 = 10,871.86 : x
  2. Step 2: Convert to fraction form
    18,423.68/25,425.10 = 10,871.86/x
  3. Step 3: Cross multiply
    18,423.68x = 25,425.10 × 10,871.86
  4. Step 4: Simplify right side
    18,423.68x = 276,418,127.69
  5. Step 5: Solve for x
    x = 276,418,127.69/18,423.68
  6. Step 6: Final answer
    x = 15,003.42

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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.