Home / 3,213.12-4,432.68-2,164.80

Finding the Fourth Proportional to 3,213.12, 4,432.68 and 2,164.80

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Solution

The fourth proportional to 3,213.12, 4,432.68 and 2,164.80 is: 2,986.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.12 : 4,432.68 = 2,164.80 : x
  2. Step 2: Convert to fraction form
    3,213.12/4,432.68 = 2,164.80/x
  3. Step 3: Cross multiply
    3,213.12x = 4,432.68 × 2,164.80
  4. Step 4: Simplify right side
    3,213.12x = 9,595,865.66
  5. Step 5: Solve for x
    x = 9,595,865.66/3,213.12
  6. Step 6: Final answer
    x = 2,986.46

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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.