Home / 7,990.08-11,985.12-2,146.69

Finding the Fourth Proportional to 7,990.08, 11,985.12 and 2,146.69

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Solution

The fourth proportional to 7,990.08, 11,985.12 and 2,146.69 is: 3,220.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.08 : 11,985.12 = 2,146.69 : x
  2. Step 2: Convert to fraction form
    7,990.08/11,985.12 = 2,146.69/x
  3. Step 3: Cross multiply
    7,990.08x = 11,985.12 × 2,146.69
  4. Step 4: Simplify right side
    7,990.08x = 25,728,379.90
  5. Step 5: Solve for x
    x = 25,728,379.90/7,990.08
  6. Step 6: Final answer
    x = 3,220.04

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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.