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Finding the Fourth Proportional to 7,965.18, 10,991 and 4,379.55

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Solution

The fourth proportional to 7,965.18, 10,991 and 4,379.55 is: 6,043.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.18 : 10,991 = 4,379.55 : x
  2. Step 2: Convert to fraction form
    7,965.18/10,991 = 4,379.55/x
  3. Step 3: Cross multiply
    7,965.18x = 10,991 × 4,379.55
  4. Step 4: Simplify right side
    7,965.18x = 48,135,634.05
  5. Step 5: Solve for x
    x = 48,135,634.05/7,965.18
  6. Step 6: Final answer
    x = 6,043.26

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Half scale
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Double scale
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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.