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Finding the Fourth Proportional to 8,697.67, 13,021.65 and 8,145.91

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Solution

The fourth proportional to 8,697.67, 13,021.65 and 8,145.91 is: 12,195.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.67 : 13,021.65 = 8,145.91 : x
  2. Step 2: Convert to fraction form
    8,697.67/13,021.65 = 8,145.91/x
  3. Step 3: Cross multiply
    8,697.67x = 13,021.65 × 8,145.91
  4. Step 4: Simplify right side
    8,697.67x = 106,073,188.95
  5. Step 5: Solve for x
    x = 106,073,188.95/8,697.67
  6. Step 6: Final answer
    x = 12,195.59

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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.