Home / 20,685.57-28,546.07-11,254.20

Finding the Fourth Proportional to 20,685.57, 28,546.07 and 11,254.20

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Solution

The fourth proportional to 20,685.57, 28,546.07 and 11,254.20 is: 15,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.57 : 28,546.07 = 11,254.20 : x
  2. Step 2: Convert to fraction form
    20,685.57/28,546.07 = 11,254.20/x
  3. Step 3: Cross multiply
    20,685.57x = 28,546.07 × 11,254.20
  4. Step 4: Simplify right side
    20,685.57x = 321,263,124.72
  5. Step 5: Solve for x
    x = 321,263,124.72/20,685.57
  6. Step 6: Final answer
    x = 15,530.78

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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.