Home / 18,215.92-25,139.87-11,147.05

Finding the Fourth Proportional to 18,215.92, 25,139.87 and 11,147.05

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Solution

The fourth proportional to 18,215.92, 25,139.87 and 11,147.05 is: 15,384.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215.92 : 25,139.87 = 11,147.05 : x
  2. Step 2: Convert to fraction form
    18,215.92/25,139.87 = 11,147.05/x
  3. Step 3: Cross multiply
    18,215.92x = 25,139.87 × 11,147.05
  4. Step 4: Simplify right side
    18,215.92x = 280,235,387.88
  5. Step 5: Solve for x
    x = 280,235,387.88/18,215.92
  6. Step 6: Final answer
    x = 15,384.09

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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.