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Finding the Fourth Proportional to 7,243.20, 9,990 and 5,562

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Solution

The fourth proportional to 7,243.20, 9,990 and 5,562 is: 7,671.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,243.20 : 9,990 = 5,562 : x
  2. Step 2: Convert to fraction form
    7,243.20/9,990 = 5,562/x
  3. Step 3: Cross multiply
    7,243.20x = 9,990 × 5,562
  4. Step 4: Simplify right side
    7,243.20x = 55,564,380
  5. Step 5: Solve for x
    x = 55,564,380/7,243.20
  6. Step 6: Final answer
    x = 7,671.25

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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.