Home / 13,909.20-20,888.10-13,471.80

Finding the Fourth Proportional to 13,909.20, 20,888.10 and 13,471.80

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Solution

The fourth proportional to 13,909.20, 20,888.10 and 13,471.80 is: 20,231.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.20 : 20,888.10 = 13,471.80 : x
  2. Step 2: Convert to fraction form
    13,909.20/20,888.10 = 13,471.80/x
  3. Step 3: Cross multiply
    13,909.20x = 20,888.10 × 13,471.80
  4. Step 4: Simplify right side
    13,909.20x = 281,400,305.58
  5. Step 5: Solve for x
    x = 281,400,305.58/13,909.20
  6. Step 6: Final answer
    x = 20,231.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.