Home / 3,986.10-5,979.15-3,621.60

Finding the Fourth Proportional to 3,986.10, 5,979.15 and 3,621.60

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Solution

The fourth proportional to 3,986.10, 5,979.15 and 3,621.60 is: 5,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.10 : 5,979.15 = 3,621.60 : x
  2. Step 2: Convert to fraction form
    3,986.10/5,979.15 = 3,621.60/x
  3. Step 3: Cross multiply
    3,986.10x = 5,979.15 × 3,621.60
  4. Step 4: Simplify right side
    3,986.10x = 21,654,089.64
  5. Step 5: Solve for x
    x = 21,654,089.64/3,986.10
  6. Step 6: Final answer
    x = 5,432.40

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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.