Home / 20,550.13-28,359.38-11,118.89

Finding the Fourth Proportional to 20,550.13, 28,359.38 and 11,118.89

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Solution

The fourth proportional to 20,550.13, 28,359.38 and 11,118.89 is: 15,344.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.13 : 28,359.38 = 11,118.89 : x
  2. Step 2: Convert to fraction form
    20,550.13/28,359.38 = 11,118.89/x
  3. Step 3: Cross multiply
    20,550.13x = 28,359.38 × 11,118.89
  4. Step 4: Simplify right side
    20,550.13x = 315,324,826.69
  5. Step 5: Solve for x
    x = 315,324,826.69/20,550.13
  6. Step 6: Final answer
    x = 15,344.18

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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.