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Finding the Fourth Proportional to 18,425.31, 25,423.74 and 10,871.07

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Solution

The fourth proportional to 18,425.31, 25,423.74 and 10,871.07 is: 15,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.31 : 25,423.74 = 10,871.07 : x
  2. Step 2: Convert to fraction form
    18,425.31/25,423.74 = 10,871.07/x
  3. Step 3: Cross multiply
    18,425.31x = 25,423.74 × 10,871.07
  4. Step 4: Simplify right side
    18,425.31x = 276,383,257.20
  5. Step 5: Solve for x
    x = 276,383,257.20/18,425.31
  6. Step 6: Final answer
    x = 15,000.20

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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.