Home / 5,115.30-7,680.24-3,890.58

Finding the Fourth Proportional to 5,115.30, 7,680.24 and 3,890.58

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Solution

The fourth proportional to 5,115.30, 7,680.24 and 3,890.58 is: 5,841.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.30 : 7,680.24 = 3,890.58 : x
  2. Step 2: Convert to fraction form
    5,115.30/7,680.24 = 3,890.58/x
  3. Step 3: Cross multiply
    5,115.30x = 7,680.24 × 3,890.58
  4. Step 4: Simplify right side
    5,115.30x = 29,880,613.48
  5. Step 5: Solve for x
    x = 29,880,613.48/5,115.30
  6. Step 6: Final answer
    x = 5,841.42

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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.