Home / 7,720.20-11,585.70-3,340.80

Finding the Fourth Proportional to 7,720.20, 11,585.70 and 3,340.80

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Solution

The fourth proportional to 7,720.20, 11,585.70 and 3,340.80 is: 5,013.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.20 : 11,585.70 = 3,340.80 : x
  2. Step 2: Convert to fraction form
    7,720.20/11,585.70 = 3,340.80/x
  3. Step 3: Cross multiply
    7,720.20x = 11,585.70 × 3,340.80
  4. Step 4: Simplify right side
    7,720.20x = 38,705,506.56
  5. Step 5: Solve for x
    x = 38,705,506.56/7,720.20
  6. Step 6: Final answer
    x = 5,013.54

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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.