Home / 7,321.20-10,989.90-4,040.70

Finding the Fourth Proportional to 7,321.20, 10,989.90 and 4,040.70

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Solution

The fourth proportional to 7,321.20, 10,989.90 and 4,040.70 is: 6,065.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.20 : 10,989.90 = 4,040.70 : x
  2. Step 2: Convert to fraction form
    7,321.20/10,989.90 = 4,040.70/x
  3. Step 3: Cross multiply
    7,321.20x = 10,989.90 × 4,040.70
  4. Step 4: Simplify right side
    7,321.20x = 44,406,888.93
  5. Step 5: Solve for x
    x = 44,406,888.93/7,321.20
  6. Step 6: Final answer
    x = 6,065.52

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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.