Home / 3,121.61-4,308.53-2,806.29

Finding the Fourth Proportional to 3,121.61, 4,308.53 and 2,806.29

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Solution

The fourth proportional to 3,121.61, 4,308.53 and 2,806.29 is: 3,873.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.61 : 4,308.53 = 2,806.29 : x
  2. Step 2: Convert to fraction form
    3,121.61/4,308.53 = 2,806.29/x
  3. Step 3: Cross multiply
    3,121.61x = 4,308.53 × 2,806.29
  4. Step 4: Simplify right side
    3,121.61x = 12,090,970.62
  5. Step 5: Solve for x
    x = 12,090,970.62/3,121.61
  6. Step 6: Final answer
    x = 3,873.32

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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.