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Finding the Fourth Proportional to 7,843.80, 11,769.34 and 2,915.15

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Solution

The fourth proportional to 7,843.80, 11,769.34 and 2,915.15 is: 4,374.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,843.80 : 11,769.34 = 2,915.15 : x
  2. Step 2: Convert to fraction form
    7,843.80/11,769.34 = 2,915.15/x
  3. Step 3: Cross multiply
    7,843.80x = 11,769.34 × 2,915.15
  4. Step 4: Simplify right side
    7,843.80x = 34,309,391.50
  5. Step 5: Solve for x
    x = 34,309,391.50/7,843.80
  6. Step 6: Final answer
    x = 4,374.08

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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.