Home / 20,560.25-28,373.16-11,128.82

Finding the Fourth Proportional to 20,560.25, 28,373.16 and 11,128.82

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Solution

The fourth proportional to 20,560.25, 28,373.16 and 11,128.82 is: 15,357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.25 : 28,373.16 = 11,128.82 : x
  2. Step 2: Convert to fraction form
    20,560.25/28,373.16 = 11,128.82/x
  3. Step 3: Cross multiply
    20,560.25x = 28,373.16 × 11,128.82
  4. Step 4: Simplify right side
    20,560.25x = 315,759,790.47
  5. Step 5: Solve for x
    x = 315,759,790.47/20,560.25
  6. Step 6: Final answer
    x = 15,357.78

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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.