Home / 7,678.32-11,517.29-2,131.53

Finding the Fourth Proportional to 7,678.32, 11,517.29 and 2,131.53

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Solution

The fourth proportional to 7,678.32, 11,517.29 and 2,131.53 is: 3,197.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.32 : 11,517.29 = 2,131.53 : x
  2. Step 2: Convert to fraction form
    7,678.32/11,517.29 = 2,131.53/x
  3. Step 3: Cross multiply
    7,678.32x = 11,517.29 × 2,131.53
  4. Step 4: Simplify right side
    7,678.32x = 24,549,449.15
  5. Step 5: Solve for x
    x = 24,549,449.15/7,678.32
  6. Step 6: Final answer
    x = 3,197.24

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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.