Home / 13,186.18-18,196.79-7,217.79

Finding the Fourth Proportional to 13,186.18, 18,196.79 and 7,217.79

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Solution

The fourth proportional to 13,186.18, 18,196.79 and 7,217.79 is: 9,960.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.18 : 18,196.79 = 7,217.79 : x
  2. Step 2: Convert to fraction form
    13,186.18/18,196.79 = 7,217.79/x
  3. Step 3: Cross multiply
    13,186.18x = 18,196.79 × 7,217.79
  4. Step 4: Simplify right side
    13,186.18x = 131,340,608.89
  5. Step 5: Solve for x
    x = 131,340,608.89/13,186.18
  6. Step 6: Final answer
    x = 9,960.47

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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.