Home / 3,911.13-5,397.49-2,142.74

Finding the Fourth Proportional to 3,911.13, 5,397.49 and 2,142.74

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Solution

The fourth proportional to 3,911.13, 5,397.49 and 2,142.74 is: 2,957.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.13 : 5,397.49 = 2,142.74 : x
  2. Step 2: Convert to fraction form
    3,911.13/5,397.49 = 2,142.74/x
  3. Step 3: Cross multiply
    3,911.13x = 5,397.49 × 2,142.74
  4. Step 4: Simplify right side
    3,911.13x = 11,565,417.72
  5. Step 5: Solve for x
    x = 11,565,417.72/3,911.13
  6. Step 6: Final answer
    x = 2,957.05

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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.