Home / 20,631.90-28,471.84-11,200.46

Finding the Fourth Proportional to 20,631.90, 28,471.84 and 11,200.46

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Solution

The fourth proportional to 20,631.90, 28,471.84 and 11,200.46 is: 15,456.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.90 : 28,471.84 = 11,200.46 : x
  2. Step 2: Convert to fraction form
    20,631.90/28,471.84 = 11,200.46/x
  3. Step 3: Cross multiply
    20,631.90x = 28,471.84 × 11,200.46
  4. Step 4: Simplify right side
    20,631.90x = 318,897,705.05
  5. Step 5: Solve for x
    x = 318,897,705.05/20,631.90
  6. Step 6: Final answer
    x = 15,456.54

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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.