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Finding the Fourth Proportional to 8,610.90, 12,915.88 and 2,767.05

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Solution

The fourth proportional to 8,610.90, 12,915.88 and 2,767.05 is: 4,150.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.90 : 12,915.88 = 2,767.05 : x
  2. Step 2: Convert to fraction form
    8,610.90/12,915.88 = 2,767.05/x
  3. Step 3: Cross multiply
    8,610.90x = 12,915.88 × 2,767.05
  4. Step 4: Simplify right side
    8,610.90x = 35,738,885.75
  5. Step 5: Solve for x
    x = 35,738,885.75/8,610.90
  6. Step 6: Final answer
    x = 4,150.42

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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.