Home / 12,718.42-17,541.78-11,143.78

Finding the Fourth Proportional to 12,718.42, 17,541.78 and 11,143.78

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Solution

The fourth proportional to 12,718.42, 17,541.78 and 11,143.78 is: 15,369.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.42 : 17,541.78 = 11,143.78 : x
  2. Step 2: Convert to fraction form
    12,718.42/17,541.78 = 11,143.78/x
  3. Step 3: Cross multiply
    12,718.42x = 17,541.78 × 11,143.78
  4. Step 4: Simplify right side
    12,718.42x = 195,481,737.13
  5. Step 5: Solve for x
    x = 195,481,737.13/12,718.42
  6. Step 6: Final answer
    x = 15,369.97

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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.