Home / 7,631.70-11,447.55-6,999.90

Finding the Fourth Proportional to 7,631.70, 11,447.55 and 6,999.90

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Solution

The fourth proportional to 7,631.70, 11,447.55 and 6,999.90 is: 10,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,631.70 : 11,447.55 = 6,999.90 : x
  2. Step 2: Convert to fraction form
    7,631.70/11,447.55 = 6,999.90/x
  3. Step 3: Cross multiply
    7,631.70x = 11,447.55 × 6,999.90
  4. Step 4: Simplify right side
    7,631.70x = 80,131,705.25
  5. Step 5: Solve for x
    x = 80,131,705.25/7,631.70
  6. Step 6: Final answer
    x = 10,499.85

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