Home / 6,639.90-9,160.02-3,982.74

Finding the Fourth Proportional to 6,639.90, 9,160.02 and 3,982.74

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Solution

The fourth proportional to 6,639.90, 9,160.02 and 3,982.74 is: 5,494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.90 : 9,160.02 = 3,982.74 : x
  2. Step 2: Convert to fraction form
    6,639.90/9,160.02 = 3,982.74/x
  3. Step 3: Cross multiply
    6,639.90x = 9,160.02 × 3,982.74
  4. Step 4: Simplify right side
    6,639.90x = 36,481,978.05
  5. Step 5: Solve for x
    x = 36,481,978.05/6,639.90
  6. Step 6: Final answer
    x = 5,494.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.