Home / 7,771.20-11,655.60-3,153.12

Finding the Fourth Proportional to 7,771.20, 11,655.60 and 3,153.12

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Solution

The fourth proportional to 7,771.20, 11,655.60 and 3,153.12 is: 4,729.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.20 : 11,655.60 = 3,153.12 : x
  2. Step 2: Convert to fraction form
    7,771.20/11,655.60 = 3,153.12/x
  3. Step 3: Cross multiply
    7,771.20x = 11,655.60 × 3,153.12
  4. Step 4: Simplify right side
    7,771.20x = 36,751,505.47
  5. Step 5: Solve for x
    x = 36,751,505.47/7,771.20
  6. Step 6: Final answer
    x = 4,729.19

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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.