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Finding the Fourth Proportional to 18,515.64, 25,551.56 and 10,132.12

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Solution

The fourth proportional to 18,515.64, 25,551.56 and 10,132.12 is: 13,982.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.64 : 25,551.56 = 10,132.12 : x
  2. Step 2: Convert to fraction form
    18,515.64/25,551.56 = 10,132.12/x
  3. Step 3: Cross multiply
    18,515.64x = 25,551.56 × 10,132.12
  4. Step 4: Simplify right side
    18,515.64x = 258,891,472.11
  5. Step 5: Solve for x
    x = 258,891,472.11/18,515.64
  6. Step 6: Final answer
    x = 13,982.31

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Double scale
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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.