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Finding the Fourth Proportional to 7,689, 11,535.42 and 2,217

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Solution

The fourth proportional to 7,689, 11,535.42 and 2,217 is: 3,326.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689 : 11,535.42 = 2,217 : x
  2. Step 2: Convert to fraction form
    7,689/11,535.42 = 2,217/x
  3. Step 3: Cross multiply
    7,689x = 11,535.42 × 2,217
  4. Step 4: Simplify right side
    7,689x = 25,574,026.14
  5. Step 5: Solve for x
    x = 25,574,026.14/7,689
  6. Step 6: Final answer
    x = 3,326.05

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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.