Home / 15,318.38-21,139.34-8,604.20

Finding the Fourth Proportional to 15,318.38, 21,139.34 and 8,604.20

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Solution

The fourth proportional to 15,318.38, 21,139.34 and 8,604.20 is: 11,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.38 : 21,139.34 = 8,604.20 : x
  2. Step 2: Convert to fraction form
    15,318.38/21,139.34 = 8,604.20/x
  3. Step 3: Cross multiply
    15,318.38x = 21,139.34 × 8,604.20
  4. Step 4: Simplify right side
    15,318.38x = 181,887,109.23
  5. Step 5: Solve for x
    x = 181,887,109.23/15,318.38
  6. Step 6: Final answer
    x = 11,873.78

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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.