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Finding the Fourth Proportional to 7,691.40, 10,619.82 and 4,711.30

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Solution

The fourth proportional to 7,691.40, 10,619.82 and 4,711.30 is: 6,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,691.40 : 10,619.82 = 4,711.30 : x
  2. Step 2: Convert to fraction form
    7,691.40/10,619.82 = 4,711.30/x
  3. Step 3: Cross multiply
    7,691.40x = 10,619.82 × 4,711.30
  4. Step 4: Simplify right side
    7,691.40x = 50,033,166.85
  5. Step 5: Solve for x
    x = 50,033,166.85/7,691.40
  6. Step 6: Final answer
    x = 6,505.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.