Home / 5,120.27-7,681.40-2,000.15

Finding the Fourth Proportional to 5,120.27, 7,681.40 and 2,000.15

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Solution

The fourth proportional to 5,120.27, 7,681.40 and 2,000.15 is: 3,000.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.27 : 7,681.40 = 2,000.15 : x
  2. Step 2: Convert to fraction form
    5,120.27/7,681.40 = 2,000.15/x
  3. Step 3: Cross multiply
    5,120.27x = 7,681.40 × 2,000.15
  4. Step 4: Simplify right side
    5,120.27x = 15,363,903.80
  5. Step 5: Solve for x
    x = 15,363,903.80/5,120.27
  6. Step 6: Final answer
    x = 3,000.61

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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.