Home / 12,717.42-17,540.40-11,142.78

Finding the Fourth Proportional to 12,717.42, 17,540.40 and 11,142.78

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Solution

The fourth proportional to 12,717.42, 17,540.40 and 11,142.78 is: 15,368.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,717.42 : 17,540.40 = 11,142.78 : x
  2. Step 2: Convert to fraction form
    12,717.42/17,540.40 = 11,142.78/x
  3. Step 3: Cross multiply
    12,717.42x = 17,540.40 × 11,142.78
  4. Step 4: Simplify right side
    12,717.42x = 195,448,818.31
  5. Step 5: Solve for x
    x = 195,448,818.31/12,717.42
  6. Step 6: Final answer
    x = 15,368.59

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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.