Home / 2,143.68-2,956.32-1,553.28

Finding the Fourth Proportional to 2,143.68, 2,956.32 and 1,553.28

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Solution

The fourth proportional to 2,143.68, 2,956.32 and 1,553.28 is: 2,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.68 : 2,956.32 = 1,553.28 : x
  2. Step 2: Convert to fraction form
    2,143.68/2,956.32 = 1,553.28/x
  3. Step 3: Cross multiply
    2,143.68x = 2,956.32 × 1,553.28
  4. Step 4: Simplify right side
    2,143.68x = 4,591,992.73
  5. Step 5: Solve for x
    x = 4,591,992.73/2,143.68
  6. Step 6: Final answer
    x = 2,142.11

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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.