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Finding the Fourth Proportional to 18,246.80, 25,171.02 and 15,851.39

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Solution

The fourth proportional to 18,246.80, 25,171.02 and 15,851.39 is: 21,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,246.80 : 25,171.02 = 15,851.39 : x
  2. Step 2: Convert to fraction form
    18,246.80/25,171.02 = 15,851.39/x
  3. Step 3: Cross multiply
    18,246.80x = 25,171.02 × 15,851.39
  4. Step 4: Simplify right side
    18,246.80x = 398,995,575.46
  5. Step 5: Solve for x
    x = 398,995,575.46/18,246.80
  6. Step 6: Final answer
    x = 21,866.61

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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.