Home / 20,560.50-28,373.49-11,129.13

Finding the Fourth Proportional to 20,560.50, 28,373.49 and 11,129.13

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Solution

The fourth proportional to 20,560.50, 28,373.49 and 11,129.13 is: 15,358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.50 : 28,373.49 = 11,129.13 : x
  2. Step 2: Convert to fraction form
    20,560.50/28,373.49 = 11,129.13/x
  3. Step 3: Cross multiply
    20,560.50x = 28,373.49 × 11,129.13
  4. Step 4: Simplify right side
    20,560.50x = 315,772,258.76
  5. Step 5: Solve for x
    x = 315,772,258.76/20,560.50
  6. Step 6: Final answer
    x = 15,358.20

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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.