Home / 3,934.66-5,429.96-2,166.40

Finding the Fourth Proportional to 3,934.66, 5,429.96 and 2,166.40

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Solution

The fourth proportional to 3,934.66, 5,429.96 and 2,166.40 is: 2,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.66 : 5,429.96 = 2,166.40 : x
  2. Step 2: Convert to fraction form
    3,934.66/5,429.96 = 2,166.40/x
  3. Step 3: Cross multiply
    3,934.66x = 5,429.96 × 2,166.40
  4. Step 4: Simplify right side
    3,934.66x = 11,763,465.34
  5. Step 5: Solve for x
    x = 11,763,465.34/3,934.66
  6. Step 6: Final answer
    x = 2,989.70

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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.