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Finding the Fourth Proportional to 7,712.60, 11,568.90 and 3,816.20

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Solution

The fourth proportional to 7,712.60, 11,568.90 and 3,816.20 is: 5,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,712.60 : 11,568.90 = 3,816.20 : x
  2. Step 2: Convert to fraction form
    7,712.60/11,568.90 = 3,816.20/x
  3. Step 3: Cross multiply
    7,712.60x = 11,568.90 × 3,816.20
  4. Step 4: Simplify right side
    7,712.60x = 44,149,236.18
  5. Step 5: Solve for x
    x = 44,149,236.18/7,712.60
  6. Step 6: Final answer
    x = 5,724.30

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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.