Home / 11,915.06-17,868.02-4,121.78

Finding the Fourth Proportional to 11,915.06, 17,868.02 and 4,121.78

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Solution

The fourth proportional to 11,915.06, 17,868.02 and 4,121.78 is: 6,181.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.06 : 17,868.02 = 4,121.78 : x
  2. Step 2: Convert to fraction form
    11,915.06/17,868.02 = 4,121.78/x
  3. Step 3: Cross multiply
    11,915.06x = 17,868.02 × 4,121.78
  4. Step 4: Simplify right side
    11,915.06x = 73,648,047.48
  5. Step 5: Solve for x
    x = 73,648,047.48/11,915.06
  6. Step 6: Final answer
    x = 6,181.09

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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.