Home / 10,115.88-15,175.42-3,188.76

Finding the Fourth Proportional to 10,115.88, 15,175.42 and 3,188.76

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Solution

The fourth proportional to 10,115.88, 15,175.42 and 3,188.76 is: 4,783.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.88 : 15,175.42 = 3,188.76 : x
  2. Step 2: Convert to fraction form
    10,115.88/15,175.42 = 3,188.76/x
  3. Step 3: Cross multiply
    10,115.88x = 15,175.42 × 3,188.76
  4. Step 4: Simplify right side
    10,115.88x = 48,390,772.28
  5. Step 5: Solve for x
    x = 48,390,772.28/10,115.88
  6. Step 6: Final answer
    x = 4,783.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.