Home / 7,821.30-11,732.45-3,140.69

Finding the Fourth Proportional to 7,821.30, 11,732.45 and 3,140.69

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Solution

The fourth proportional to 7,821.30, 11,732.45 and 3,140.69 is: 4,711.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.30 : 11,732.45 = 3,140.69 : x
  2. Step 2: Convert to fraction form
    7,821.30/11,732.45 = 3,140.69/x
  3. Step 3: Cross multiply
    7,821.30x = 11,732.45 × 3,140.69
  4. Step 4: Simplify right side
    7,821.30x = 36,847,988.39
  5. Step 5: Solve for x
    x = 36,847,988.39/7,821.30
  6. Step 6: Final answer
    x = 4,711.24

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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.