Home / 3,934.89-5,430.38-2,166.88

Finding the Fourth Proportional to 3,934.89, 5,430.38 and 2,166.88

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Solution

The fourth proportional to 3,934.89, 5,430.38 and 2,166.88 is: 2,990.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.89 : 5,430.38 = 2,166.88 : x
  2. Step 2: Convert to fraction form
    3,934.89/5,430.38 = 2,166.88/x
  3. Step 3: Cross multiply
    3,934.89x = 5,430.38 × 2,166.88
  4. Step 4: Simplify right side
    3,934.89x = 11,766,981.81
  5. Step 5: Solve for x
    x = 11,766,981.81/3,934.89
  6. Step 6: Final answer
    x = 2,990.42

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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.