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Finding the Fourth Proportional to 7,239.87, 9,989.39 and 4,407.17

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Solution

The fourth proportional to 7,239.87, 9,989.39 and 4,407.17 is: 6,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.87 : 9,989.39 = 4,407.17 : x
  2. Step 2: Convert to fraction form
    7,239.87/9,989.39 = 4,407.17/x
  3. Step 3: Cross multiply
    7,239.87x = 9,989.39 × 4,407.17
  4. Step 4: Simplify right side
    7,239.87x = 44,024,901.00
  5. Step 5: Solve for x
    x = 44,024,901.00/7,239.87
  6. Step 6: Final answer
    x = 6,080.90

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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.