Home / 3,911.08-5,397.29-2,142.70

Finding the Fourth Proportional to 3,911.08, 5,397.29 and 2,142.70

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Solution

The fourth proportional to 3,911.08, 5,397.29 and 2,142.70 is: 2,956.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.08 : 5,397.29 = 2,142.70 : x
  2. Step 2: Convert to fraction form
    3,911.08/5,397.29 = 2,142.70/x
  3. Step 3: Cross multiply
    3,911.08x = 5,397.29 × 2,142.70
  4. Step 4: Simplify right side
    3,911.08x = 11,564,773.28
  5. Step 5: Solve for x
    x = 11,564,773.28/3,911.08
  6. Step 6: Final answer
    x = 2,956.93

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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.