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Finding the Fourth Proportional to 18,809.62, 25,957.14 and 10,311.70

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Solution

The fourth proportional to 18,809.62, 25,957.14 and 10,311.70 is: 14,230.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.62 : 25,957.14 = 10,311.70 : x
  2. Step 2: Convert to fraction form
    18,809.62/25,957.14 = 10,311.70/x
  3. Step 3: Cross multiply
    18,809.62x = 25,957.14 × 10,311.70
  4. Step 4: Simplify right side
    18,809.62x = 267,662,240.54
  5. Step 5: Solve for x
    x = 267,662,240.54/18,809.62
  6. Step 6: Final answer
    x = 14,230.07

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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.