Home / 7,239.12-9,990.27-4,722.90

Finding the Fourth Proportional to 7,239.12, 9,990.27 and 4,722.90

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Solution

The fourth proportional to 7,239.12, 9,990.27 and 4,722.90 is: 6,517.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.12 : 9,990.27 = 4,722.90 : x
  2. Step 2: Convert to fraction form
    7,239.12/9,990.27 = 4,722.90/x
  3. Step 3: Cross multiply
    7,239.12x = 9,990.27 × 4,722.90
  4. Step 4: Simplify right side
    7,239.12x = 47,183,046.18
  5. Step 5: Solve for x
    x = 47,183,046.18/7,239.12
  6. Step 6: Final answer
    x = 6,517.79

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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.