Home / 20,550.39-28,359.72-11,119.14

Finding the Fourth Proportional to 20,550.39, 28,359.72 and 11,119.14

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Solution

The fourth proportional to 20,550.39, 28,359.72 and 11,119.14 is: 15,344.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.39 : 28,359.72 = 11,119.14 : x
  2. Step 2: Convert to fraction form
    20,550.39/28,359.72 = 11,119.14/x
  3. Step 3: Cross multiply
    20,550.39x = 28,359.72 × 11,119.14
  4. Step 4: Simplify right side
    20,550.39x = 315,335,697.04
  5. Step 5: Solve for x
    x = 315,335,697.04/20,550.39
  6. Step 6: Final answer
    x = 15,344.51

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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.