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Finding the Fourth Proportional to 7,023.02, 9,691.38 and 3,879

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Solution

The fourth proportional to 7,023.02, 9,691.38 and 3,879 is: 5,352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,023.02 : 9,691.38 = 3,879 : x
  2. Step 2: Convert to fraction form
    7,023.02/9,691.38 = 3,879/x
  3. Step 3: Cross multiply
    7,023.02x = 9,691.38 × 3,879
  4. Step 4: Simplify right side
    7,023.02x = 37,592,863.02
  5. Step 5: Solve for x
    x = 37,592,863.02/7,023.02
  6. Step 6: Final answer
    x = 5,352.81

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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.