Home / 20,550.64-28,359.84-11,119.20

Finding the Fourth Proportional to 20,550.64, 28,359.84 and 11,119.20

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Solution

The fourth proportional to 20,550.64, 28,359.84 and 11,119.20 is: 15,344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.64 : 28,359.84 = 11,119.20 : x
  2. Step 2: Convert to fraction form
    20,550.64/28,359.84 = 11,119.20/x
  3. Step 3: Cross multiply
    20,550.64x = 28,359.84 × 11,119.20
  4. Step 4: Simplify right side
    20,550.64x = 315,338,732.93
  5. Step 5: Solve for x
    x = 315,338,732.93/20,550.64
  6. Step 6: Final answer
    x = 15,344.47

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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.