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Finding the Fourth Proportional to 18,151.20, 25,046.16 and 10,982.40

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Solution

The fourth proportional to 18,151.20, 25,046.16 and 10,982.40 is: 15,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.20 : 25,046.16 = 10,982.40 : x
  2. Step 2: Convert to fraction form
    18,151.20/25,046.16 = 10,982.40/x
  3. Step 3: Cross multiply
    18,151.20x = 25,046.16 × 10,982.40
  4. Step 4: Simplify right side
    18,151.20x = 275,066,947.58
  5. Step 5: Solve for x
    x = 275,066,947.58/18,151.20
  6. Step 6: Final answer
    x = 15,154.20

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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.