Home / 3,934.95-5,430.20-2,166.53

Finding the Fourth Proportional to 3,934.95, 5,430.20 and 2,166.53

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Solution

The fourth proportional to 3,934.95, 5,430.20 and 2,166.53 is: 2,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.95 : 5,430.20 = 2,166.53 : x
  2. Step 2: Convert to fraction form
    3,934.95/5,430.20 = 2,166.53/x
  3. Step 3: Cross multiply
    3,934.95x = 5,430.20 × 2,166.53
  4. Step 4: Simplify right side
    3,934.95x = 11,764,653.22
  5. Step 5: Solve for x
    x = 11,764,653.22/3,934.95
  6. Step 6: Final answer
    x = 2,989.78

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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.