Home / 3,915.76-5,392.56-3,127.36

Finding the Fourth Proportional to 3,915.76, 5,392.56 and 3,127.36

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Solution

The fourth proportional to 3,915.76, 5,392.56 and 3,127.36 is: 4,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.76 : 5,392.56 = 3,127.36 : x
  2. Step 2: Convert to fraction form
    3,915.76/5,392.56 = 3,127.36/x
  3. Step 3: Cross multiply
    3,915.76x = 5,392.56 × 3,127.36
  4. Step 4: Simplify right side
    3,915.76x = 16,864,476.44
  5. Step 5: Solve for x
    x = 16,864,476.44/3,915.76
  6. Step 6: Final answer
    x = 4,306.82

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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.