Home / 3,116.67-4,294.49-2,120.21

Finding the Fourth Proportional to 3,116.67, 4,294.49 and 2,120.21

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Solution

The fourth proportional to 3,116.67, 4,294.49 and 2,120.21 is: 2,921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.67 : 4,294.49 = 2,120.21 : x
  2. Step 2: Convert to fraction form
    3,116.67/4,294.49 = 2,120.21/x
  3. Step 3: Cross multiply
    3,116.67x = 4,294.49 × 2,120.21
  4. Step 4: Simplify right side
    3,116.67x = 9,105,188.57
  5. Step 5: Solve for x
    x = 9,105,188.57/3,116.67
  6. Step 6: Final answer
    x = 2,921.45

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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.