Home / 10,219.78-15,321.40-3,196.18

Finding the Fourth Proportional to 10,219.78, 15,321.40 and 3,196.18

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Solution

The fourth proportional to 10,219.78, 15,321.40 and 3,196.18 is: 4,791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,219.78 : 15,321.40 = 3,196.18 : x
  2. Step 2: Convert to fraction form
    10,219.78/15,321.40 = 3,196.18/x
  3. Step 3: Cross multiply
    10,219.78x = 15,321.40 × 3,196.18
  4. Step 4: Simplify right side
    10,219.78x = 48,969,963.41
  5. Step 5: Solve for x
    x = 48,969,963.41/10,219.78
  6. Step 6: Final answer
    x = 4,791.68

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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.