Home / 2,125.18-3,170.70-1,891.30

Finding the Fourth Proportional to 2,125.18, 3,170.70 and 1,891.30

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Solution

The fourth proportional to 2,125.18, 3,170.70 and 1,891.30 is: 2,821.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.18 : 3,170.70 = 1,891.30 : x
  2. Step 2: Convert to fraction form
    2,125.18/3,170.70 = 1,891.30/x
  3. Step 3: Cross multiply
    2,125.18x = 3,170.70 × 1,891.30
  4. Step 4: Simplify right side
    2,125.18x = 5,996,744.91
  5. Step 5: Solve for x
    x = 5,996,744.91/2,125.18
  6. Step 6: Final answer
    x = 2,821.76

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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.