Home / 20,470.66-28,249.23-11,978.62

Finding the Fourth Proportional to 20,470.66, 28,249.23 and 11,978.62

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Solution

The fourth proportional to 20,470.66, 28,249.23 and 11,978.62 is: 16,530.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.66 : 28,249.23 = 11,978.62 : x
  2. Step 2: Convert to fraction form
    20,470.66/28,249.23 = 11,978.62/x
  3. Step 3: Cross multiply
    20,470.66x = 28,249.23 × 11,978.62
  4. Step 4: Simplify right side
    20,470.66x = 338,386,791.46
  5. Step 5: Solve for x
    x = 338,386,791.46/20,470.66
  6. Step 6: Final answer
    x = 16,530.33

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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.