Home / 13,191.38-18,204.10-7,223.09

Finding the Fourth Proportional to 13,191.38, 18,204.10 and 7,223.09

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Solution

The fourth proportional to 13,191.38, 18,204.10 and 7,223.09 is: 9,967.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.38 : 18,204.10 = 7,223.09 : x
  2. Step 2: Convert to fraction form
    13,191.38/18,204.10 = 7,223.09/x
  3. Step 3: Cross multiply
    13,191.38x = 18,204.10 × 7,223.09
  4. Step 4: Simplify right side
    13,191.38x = 131,489,880.12
  5. Step 5: Solve for x
    x = 131,489,880.12/13,191.38
  6. Step 6: Final answer
    x = 9,967.87

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.