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Finding the Fourth Proportional to 7,641.80, 11,451.90 and 4,711.40

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Solution

The fourth proportional to 7,641.80, 11,451.90 and 4,711.40 is: 7,060.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,641.80 : 11,451.90 = 4,711.40 : x
  2. Step 2: Convert to fraction form
    7,641.80/11,451.90 = 4,711.40/x
  3. Step 3: Cross multiply
    7,641.80x = 11,451.90 × 4,711.40
  4. Step 4: Simplify right side
    7,641.80x = 53,954,481.66
  5. Step 5: Solve for x
    x = 53,954,481.66/7,641.80
  6. Step 6: Final answer
    x = 7,060.44

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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.