Home / 20,560.75-28,373.85-11,129.32

Finding the Fourth Proportional to 20,560.75, 28,373.85 and 11,129.32

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Solution

The fourth proportional to 20,560.75, 28,373.85 and 11,129.32 is: 15,358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.75 : 28,373.85 = 11,129.32 : x
  2. Step 2: Convert to fraction form
    20,560.75/28,373.85 = 11,129.32/x
  3. Step 3: Cross multiply
    20,560.75x = 28,373.85 × 11,129.32
  4. Step 4: Simplify right side
    20,560.75x = 315,781,656.28
  5. Step 5: Solve for x
    x = 315,781,656.28/20,560.75
  6. Step 6: Final answer
    x = 15,358.47

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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.