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Finding the Fourth Proportional to 18,425.56, 25,424.09 and 10,871.32

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Solution

The fourth proportional to 18,425.56, 25,424.09 and 10,871.32 is: 15,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.56 : 25,424.09 = 10,871.32 : x
  2. Step 2: Convert to fraction form
    18,425.56/25,424.09 = 10,871.32/x
  3. Step 3: Cross multiply
    18,425.56x = 25,424.09 × 10,871.32
  4. Step 4: Simplify right side
    18,425.56x = 276,393,363.74
  5. Step 5: Solve for x
    x = 276,393,363.74/18,425.56
  6. Step 6: Final answer
    x = 15,000.54

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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.