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Finding the Fourth Proportional to 8,610.67, 12,915.60 and 3,412.90

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Solution

The fourth proportional to 8,610.67, 12,915.60 and 3,412.90 is: 5,119.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.67 : 12,915.60 = 3,412.90 : x
  2. Step 2: Convert to fraction form
    8,610.67/12,915.60 = 3,412.90/x
  3. Step 3: Cross multiply
    8,610.67x = 12,915.60 × 3,412.90
  4. Step 4: Simplify right side
    8,610.67x = 44,079,651.24
  5. Step 5: Solve for x
    x = 44,079,651.24/8,610.67
  6. Step 6: Final answer
    x = 5,119.19

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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.