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Finding the Fourth Proportional to 18,474.70, 25,494 and 10,921.72

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Solution

The fourth proportional to 18,474.70, 25,494 and 10,921.72 is: 15,071.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.70 : 25,494 = 10,921.72 : x
  2. Step 2: Convert to fraction form
    18,474.70/25,494 = 10,921.72/x
  3. Step 3: Cross multiply
    18,474.70x = 25,494 × 10,921.72
  4. Step 4: Simplify right side
    18,474.70x = 278,438,329.68
  5. Step 5: Solve for x
    x = 278,438,329.68/18,474.70
  6. Step 6: Final answer
    x = 15,071.33

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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.