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Finding the Fourth Proportional to 7,339.15, 10,989.28 and 3,869.11

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Solution

The fourth proportional to 7,339.15, 10,989.28 and 3,869.11 is: 5,793.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.15 : 10,989.28 = 3,869.11 : x
  2. Step 2: Convert to fraction form
    7,339.15/10,989.28 = 3,869.11/x
  3. Step 3: Cross multiply
    7,339.15x = 10,989.28 × 3,869.11
  4. Step 4: Simplify right side
    7,339.15x = 42,518,733.14
  5. Step 5: Solve for x
    x = 42,518,733.14/7,339.15
  6. Step 6: Final answer
    x = 5,793.41

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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.