Home / 6,281.72-9,420.15-2,120.61

Finding the Fourth Proportional to 6,281.72, 9,420.15 and 2,120.61

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Solution

The fourth proportional to 6,281.72, 9,420.15 and 2,120.61 is: 3,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,281.72 : 9,420.15 = 2,120.61 : x
  2. Step 2: Convert to fraction form
    6,281.72/9,420.15 = 2,120.61/x
  3. Step 3: Cross multiply
    6,281.72x = 9,420.15 × 2,120.61
  4. Step 4: Simplify right side
    6,281.72x = 19,976,464.29
  5. Step 5: Solve for x
    x = 19,976,464.29/6,281.72
  6. Step 6: Final answer
    x = 3,180.10

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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.