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Finding the Fourth Proportional to 7,691.60, 11,537.40 and 6,719.60

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Solution

The fourth proportional to 7,691.60, 11,537.40 and 6,719.60 is: 10,079.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,691.60 : 11,537.40 = 6,719.60 : x
  2. Step 2: Convert to fraction form
    7,691.60/11,537.40 = 6,719.60/x
  3. Step 3: Cross multiply
    7,691.60x = 11,537.40 × 6,719.60
  4. Step 4: Simplify right side
    7,691.60x = 77,526,713.04
  5. Step 5: Solve for x
    x = 77,526,713.04/7,691.60
  6. Step 6: Final answer
    x = 10,079.40

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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.