Home / 2,121.40-3,181.18-1,244.84

Finding the Fourth Proportional to 2,121.40, 3,181.18 and 1,244.84

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Solution

The fourth proportional to 2,121.40, 3,181.18 and 1,244.84 is: 1,866.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.40 : 3,181.18 = 1,244.84 : x
  2. Step 2: Convert to fraction form
    2,121.40/3,181.18 = 1,244.84/x
  3. Step 3: Cross multiply
    2,121.40x = 3,181.18 × 1,244.84
  4. Step 4: Simplify right side
    2,121.40x = 3,960,060.11
  5. Step 5: Solve for x
    x = 3,960,060.11/2,121.40
  6. Step 6: Final answer
    x = 1,866.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.