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Finding the Fourth Proportional to 7,998.20, 11,182.90 and 7,998.20

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Solution

The fourth proportional to 7,998.20, 11,182.90 and 7,998.20 is: 11,182.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.20 : 11,182.90 = 7,998.20 : x
  2. Step 2: Convert to fraction form
    7,998.20/11,182.90 = 7,998.20/x
  3. Step 3: Cross multiply
    7,998.20x = 11,182.90 × 7,998.20
  4. Step 4: Simplify right side
    7,998.20x = 89,443,070.78
  5. Step 5: Solve for x
    x = 89,443,070.78/7,998.20
  6. Step 6: Final answer
    x = 11,182.90

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Half scale
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Double scale
Find fourth proportional to 7,999.20, 11,184.30 and 7,999.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.