Home / 12,147.91-18,221.87-9,378.63

Finding the Fourth Proportional to 12,147.91, 18,221.87 and 9,378.63

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Solution

The fourth proportional to 12,147.91, 18,221.87 and 9,378.63 is: 14,067.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.91 : 18,221.87 = 9,378.63 : x
  2. Step 2: Convert to fraction form
    12,147.91/18,221.87 = 9,378.63/x
  3. Step 3: Cross multiply
    12,147.91x = 18,221.87 × 9,378.63
  4. Step 4: Simplify right side
    12,147.91x = 170,896,176.64
  5. Step 5: Solve for x
    x = 170,896,176.64/12,147.91
  6. Step 6: Final answer
    x = 14,067.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.