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Finding the Fourth Proportional to 5,765.20, 8,647.80 and 5,327.80

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Solution

The fourth proportional to 5,765.20, 8,647.80 and 5,327.80 is: 7,991.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,765.20 : 8,647.80 = 5,327.80 : x
  2. Step 2: Convert to fraction form
    5,765.20/8,647.80 = 5,327.80/x
  3. Step 3: Cross multiply
    5,765.20x = 8,647.80 × 5,327.80
  4. Step 4: Simplify right side
    5,765.20x = 46,073,748.84
  5. Step 5: Solve for x
    x = 46,073,748.84/5,765.20
  6. Step 6: Final answer
    x = 7,991.70

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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.