Home / 20,449.76-28,220-11,497.04

Finding the Fourth Proportional to 20,449.76, 28,220 and 11,497.04

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Solution

The fourth proportional to 20,449.76, 28,220 and 11,497.04 is: 15,865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.76 : 28,220 = 11,497.04 : x
  2. Step 2: Convert to fraction form
    20,449.76/28,220 = 11,497.04/x
  3. Step 3: Cross multiply
    20,449.76x = 28,220 × 11,497.04
  4. Step 4: Simplify right side
    20,449.76x = 324,446,468.80
  5. Step 5: Solve for x
    x = 324,446,468.80/20,449.76
  6. Step 6: Final answer
    x = 15,865.54

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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.