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Finding the Fourth Proportional to 7,760.40, 11,641.17 and 2,214.21

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Solution

The fourth proportional to 7,760.40, 11,641.17 and 2,214.21 is: 3,321.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,760.40 : 11,641.17 = 2,214.21 : x
  2. Step 2: Convert to fraction form
    7,760.40/11,641.17 = 2,214.21/x
  3. Step 3: Cross multiply
    7,760.40x = 11,641.17 × 2,214.21
  4. Step 4: Simplify right side
    7,760.40x = 25,775,995.03
  5. Step 5: Solve for x
    x = 25,775,995.03/7,760.40
  6. Step 6: Final answer
    x = 3,321.48

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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.