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Finding the Fourth Proportional to 8,691.36, 13,040.64 and 3,760.08

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Solution

The fourth proportional to 8,691.36, 13,040.64 and 3,760.08 is: 5,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.36 : 13,040.64 = 3,760.08 : x
  2. Step 2: Convert to fraction form
    8,691.36/13,040.64 = 3,760.08/x
  3. Step 3: Cross multiply
    8,691.36x = 13,040.64 × 3,760.08
  4. Step 4: Simplify right side
    8,691.36x = 49,033,849.65
  5. Step 5: Solve for x
    x = 49,033,849.65/8,691.36
  6. Step 6: Final answer
    x = 5,641.68

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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.