Home / 3,986.01-5,979.02-1,387.53

Finding the Fourth Proportional to 3,986.01, 5,979.02 and 1,387.53

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Solution

The fourth proportional to 3,986.01, 5,979.02 and 1,387.53 is: 2,081.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.01 : 5,979.02 = 1,387.53 : x
  2. Step 2: Convert to fraction form
    3,986.01/5,979.02 = 1,387.53/x
  3. Step 3: Cross multiply
    3,986.01x = 5,979.02 × 1,387.53
  4. Step 4: Simplify right side
    3,986.01x = 8,296,062.68
  5. Step 5: Solve for x
    x = 8,296,062.68/3,986.01
  6. Step 6: Final answer
    x = 2,081.30

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Double scale
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Similar ratio
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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.