Home / 15,857.28-21,864.78-12,863.88

Finding the Fourth Proportional to 15,857.28, 21,864.78 and 12,863.88

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Solution

The fourth proportional to 15,857.28, 21,864.78 and 12,863.88 is: 17,737.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.28 : 21,864.78 = 12,863.88 : x
  2. Step 2: Convert to fraction form
    15,857.28/21,864.78 = 12,863.88/x
  3. Step 3: Cross multiply
    15,857.28x = 21,864.78 × 12,863.88
  4. Step 4: Simplify right side
    15,857.28x = 281,265,906.15
  5. Step 5: Solve for x
    x = 281,265,906.15/15,857.28
  6. Step 6: Final answer
    x = 17,737.34

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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.