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Finding the Fourth Proportional to 18,712.52, 25,823.90 and 10,215.15

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Solution

The fourth proportional to 18,712.52, 25,823.90 and 10,215.15 is: 14,097.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.52 : 25,823.90 = 10,215.15 : x
  2. Step 2: Convert to fraction form
    18,712.52/25,823.90 = 10,215.15/x
  3. Step 3: Cross multiply
    18,712.52x = 25,823.90 × 10,215.15
  4. Step 4: Simplify right side
    18,712.52x = 263,794,882.97
  5. Step 5: Solve for x
    x = 263,794,882.97/18,712.52
  6. Step 6: Final answer
    x = 14,097.24

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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.