Home / 3,121.11-4,302.18-2,457.09

Finding the Fourth Proportional to 3,121.11, 4,302.18 and 2,457.09

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Solution

The fourth proportional to 3,121.11, 4,302.18 and 2,457.09 is: 3,386.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.11 : 4,302.18 = 2,457.09 : x
  2. Step 2: Convert to fraction form
    3,121.11/4,302.18 = 2,457.09/x
  3. Step 3: Cross multiply
    3,121.11x = 4,302.18 × 2,457.09
  4. Step 4: Simplify right side
    3,121.11x = 10,570,843.46
  5. Step 5: Solve for x
    x = 10,570,843.46/3,121.11
  6. Step 6: Final answer
    x = 3,386.89

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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.