Home / 20,550.16-28,359.30-11,118.79

Finding the Fourth Proportional to 20,550.16, 28,359.30 and 11,118.79

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Solution

The fourth proportional to 20,550.16, 28,359.30 and 11,118.79 is: 15,343.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.16 : 28,359.30 = 11,118.79 : x
  2. Step 2: Convert to fraction form
    20,550.16/28,359.30 = 11,118.79/x
  3. Step 3: Cross multiply
    20,550.16x = 28,359.30 × 11,118.79
  4. Step 4: Simplify right side
    20,550.16x = 315,321,101.25
  5. Step 5: Solve for x
    x = 315,321,101.25/20,550.16
  6. Step 6: Final answer
    x = 15,343.97

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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.