Home / 20,631.68-28,471.76-11,200.28

Finding the Fourth Proportional to 20,631.68, 28,471.76 and 11,200.28

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Solution

The fourth proportional to 20,631.68, 28,471.76 and 11,200.28 is: 15,456.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.68 : 28,471.76 = 11,200.28 : x
  2. Step 2: Convert to fraction form
    20,631.68/28,471.76 = 11,200.28/x
  3. Step 3: Cross multiply
    20,631.68x = 28,471.76 × 11,200.28
  4. Step 4: Simplify right side
    20,631.68x = 318,891,684.09
  5. Step 5: Solve for x
    x = 318,891,684.09/20,631.68
  6. Step 6: Final answer
    x = 15,456.41

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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.