Home / 20,700.20-28,566.27-11,268.75

Finding the Fourth Proportional to 20,700.20, 28,566.27 and 11,268.75

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Solution

The fourth proportional to 20,700.20, 28,566.27 and 11,268.75 is: 15,550.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.20 : 28,566.27 = 11,268.75 : x
  2. Step 2: Convert to fraction form
    20,700.20/28,566.27 = 11,268.75/x
  3. Step 3: Cross multiply
    20,700.20x = 28,566.27 × 11,268.75
  4. Step 4: Simplify right side
    20,700.20x = 321,906,155.06
  5. Step 5: Solve for x
    x = 321,906,155.06/20,700.20
  6. Step 6: Final answer
    x = 15,550.88

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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.