Home / 12,186.30-18,279.45-6,342.15

Finding the Fourth Proportional to 12,186.30, 18,279.45 and 6,342.15

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Solution

The fourth proportional to 12,186.30, 18,279.45 and 6,342.15 is: 9,513.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.30 : 18,279.45 = 6,342.15 : x
  2. Step 2: Convert to fraction form
    12,186.30/18,279.45 = 6,342.15/x
  3. Step 3: Cross multiply
    12,186.30x = 18,279.45 × 6,342.15
  4. Step 4: Simplify right side
    12,186.30x = 115,931,013.82
  5. Step 5: Solve for x
    x = 115,931,013.82/12,186.30
  6. Step 6: Final answer
    x = 9,513.23

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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.