Home / 7,639.31-11,454.72-2,640.20

Finding the Fourth Proportional to 7,639.31, 11,454.72 and 2,640.20

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Solution

The fourth proportional to 7,639.31, 11,454.72 and 2,640.20 is: 3,958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.31 : 11,454.72 = 2,640.20 : x
  2. Step 2: Convert to fraction form
    7,639.31/11,454.72 = 2,640.20/x
  3. Step 3: Cross multiply
    7,639.31x = 11,454.72 × 2,640.20
  4. Step 4: Simplify right side
    7,639.31x = 30,242,684.57
  5. Step 5: Solve for x
    x = 30,242,684.57/7,639.31
  6. Step 6: Final answer
    x = 3,958.82

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1.5x scale

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.