Home / 2,621.27-3,613.15-1,989.74

Finding the Fourth Proportional to 2,621.27, 3,613.15 and 1,989.74

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Solution

The fourth proportional to 2,621.27, 3,613.15 and 1,989.74 is: 2,742.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.27 : 3,613.15 = 1,989.74 : x
  2. Step 2: Convert to fraction form
    2,621.27/3,613.15 = 1,989.74/x
  3. Step 3: Cross multiply
    2,621.27x = 3,613.15 × 1,989.74
  4. Step 4: Simplify right side
    2,621.27x = 7,189,229.08
  5. Step 5: Solve for x
    x = 7,189,229.08/2,621.27
  6. Step 6: Final answer
    x = 2,742.65

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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.