Home / 3,613.64-4,987.22-2,121.80

Finding the Fourth Proportional to 3,613.64, 4,987.22 and 2,121.80

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Solution

The fourth proportional to 3,613.64, 4,987.22 and 2,121.80 is: 2,928.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.64 : 4,987.22 = 2,121.80 : x
  2. Step 2: Convert to fraction form
    3,613.64/4,987.22 = 2,121.80/x
  3. Step 3: Cross multiply
    3,613.64x = 4,987.22 × 2,121.80
  4. Step 4: Simplify right side
    3,613.64x = 10,581,883.40
  5. Step 5: Solve for x
    x = 10,581,883.40/3,613.64
  6. Step 6: Final answer
    x = 2,928.32

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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.