Home / 2,161.20-3,215.84-2,153.90

Finding the Fourth Proportional to 2,161.20, 3,215.84 and 2,153.90

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Solution

The fourth proportional to 2,161.20, 3,215.84 and 2,153.90 is: 3,204.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.20 : 3,215.84 = 2,153.90 : x
  2. Step 2: Convert to fraction form
    2,161.20/3,215.84 = 2,153.90/x
  3. Step 3: Cross multiply
    2,161.20x = 3,215.84 × 2,153.90
  4. Step 4: Simplify right side
    2,161.20x = 6,926,597.78
  5. Step 5: Solve for x
    x = 6,926,597.78/2,161.20
  6. Step 6: Final answer
    x = 3,204.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.