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Finding the Fourth Proportional to 7,759.72, 11,639.58 and 1,916.44

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Solution

The fourth proportional to 7,759.72, 11,639.58 and 1,916.44 is: 2,874.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,759.72 : 11,639.58 = 1,916.44 : x
  2. Step 2: Convert to fraction form
    7,759.72/11,639.58 = 1,916.44/x
  3. Step 3: Cross multiply
    7,759.72x = 11,639.58 × 1,916.44
  4. Step 4: Simplify right side
    7,759.72x = 22,306,556.70
  5. Step 5: Solve for x
    x = 22,306,556.70/7,759.72
  6. Step 6: Final answer
    x = 2,874.66

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Similar ratio
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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.