Home / 3,934.98-5,430.28-2,166.70

Finding the Fourth Proportional to 3,934.98, 5,430.28 and 2,166.70

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Solution

The fourth proportional to 3,934.98, 5,430.28 and 2,166.70 is: 2,990.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.98 : 5,430.28 = 2,166.70 : x
  2. Step 2: Convert to fraction form
    3,934.98/5,430.28 = 2,166.70/x
  3. Step 3: Cross multiply
    3,934.98x = 5,430.28 × 2,166.70
  4. Step 4: Simplify right side
    3,934.98x = 11,765,787.68
  5. Step 5: Solve for x
    x = 11,765,787.68/3,934.98
  6. Step 6: Final answer
    x = 2,990.05

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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.