Home / 3,911.16-5,397.12-2,142.48

Finding the Fourth Proportional to 3,911.16, 5,397.12 and 2,142.48

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Solution

The fourth proportional to 3,911.16, 5,397.12 and 2,142.48 is: 2,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.16 : 5,397.12 = 2,142.48 : x
  2. Step 2: Convert to fraction form
    3,911.16/5,397.12 = 2,142.48/x
  3. Step 3: Cross multiply
    3,911.16x = 5,397.12 × 2,142.48
  4. Step 4: Simplify right side
    3,911.16x = 11,563,221.66
  5. Step 5: Solve for x
    x = 11,563,221.66/3,911.16
  6. Step 6: Final answer
    x = 2,956.47

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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.