Home / 20,471.38-28,250.70-11,518.44

Finding the Fourth Proportional to 20,471.38, 28,250.70 and 11,518.44

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Solution

The fourth proportional to 20,471.38, 28,250.70 and 11,518.44 is: 15,895.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.38 : 28,250.70 = 11,518.44 : x
  2. Step 2: Convert to fraction form
    20,471.38/28,250.70 = 11,518.44/x
  3. Step 3: Cross multiply
    20,471.38x = 28,250.70 × 11,518.44
  4. Step 4: Simplify right side
    20,471.38x = 325,403,992.91
  5. Step 5: Solve for x
    x = 325,403,992.91/20,471.38
  6. Step 6: Final answer
    x = 15,895.56

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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.