Home / 3,934.80-5,430.11-2,166.44

Finding the Fourth Proportional to 3,934.80, 5,430.11 and 2,166.44

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Solution

The fourth proportional to 3,934.80, 5,430.11 and 2,166.44 is: 2,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.80 : 5,430.11 = 2,166.44 : x
  2. Step 2: Convert to fraction form
    3,934.80/5,430.11 = 2,166.44/x
  3. Step 3: Cross multiply
    3,934.80x = 5,430.11 × 2,166.44
  4. Step 4: Simplify right side
    3,934.80x = 11,763,969.53
  5. Step 5: Solve for x
    x = 11,763,969.53/3,934.80
  6. Step 6: Final answer
    x = 2,989.72

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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.