Home / 3,122.40-4,309.12-2,073.76

Finding the Fourth Proportional to 3,122.40, 4,309.12 and 2,073.76

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Solution

The fourth proportional to 3,122.40, 4,309.12 and 2,073.76 is: 2,861.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.40 : 4,309.12 = 2,073.76 : x
  2. Step 2: Convert to fraction form
    3,122.40/4,309.12 = 2,073.76/x
  3. Step 3: Cross multiply
    3,122.40x = 4,309.12 × 2,073.76
  4. Step 4: Simplify right side
    3,122.40x = 8,936,080.69
  5. Step 5: Solve for x
    x = 8,936,080.69/3,122.40
  6. Step 6: Final answer
    x = 2,861.93

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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.