Home / 12,385.38-17,091.73-6,720.13

Finding the Fourth Proportional to 12,385.38, 17,091.73 and 6,720.13

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Solution

The fourth proportional to 12,385.38, 17,091.73 and 6,720.13 is: 9,273.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.38 : 17,091.73 = 6,720.13 : x
  2. Step 2: Convert to fraction form
    12,385.38/17,091.73 = 6,720.13/x
  3. Step 3: Cross multiply
    12,385.38x = 17,091.73 × 6,720.13
  4. Step 4: Simplify right side
    12,385.38x = 114,858,647.52
  5. Step 5: Solve for x
    x = 114,858,647.52/12,385.38
  6. Step 6: Final answer
    x = 9,273.73

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Half scale
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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.