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Finding the Fourth Proportional to 18,641.14, 25,724.18 and 10,143.43

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Solution

The fourth proportional to 18,641.14, 25,724.18 and 10,143.43 is: 13,997.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.14 : 25,724.18 = 10,143.43 : x
  2. Step 2: Convert to fraction form
    18,641.14/25,724.18 = 10,143.43/x
  3. Step 3: Cross multiply
    18,641.14x = 25,724.18 × 10,143.43
  4. Step 4: Simplify right side
    18,641.14x = 260,931,380.19
  5. Step 5: Solve for x
    x = 260,931,380.19/18,641.14
  6. Step 6: Final answer
    x = 13,997.61

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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.