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Finding the Fourth Proportional to 8,607.99, 12,912.90 and 3,061.85

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Solution

The fourth proportional to 8,607.99, 12,912.90 and 3,061.85 is: 4,593.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.99 : 12,912.90 = 3,061.85 : x
  2. Step 2: Convert to fraction form
    8,607.99/12,912.90 = 3,061.85/x
  3. Step 3: Cross multiply
    8,607.99x = 12,912.90 × 3,061.85
  4. Step 4: Simplify right side
    8,607.99x = 39,537,335.24
  5. Step 5: Solve for x
    x = 39,537,335.24/8,607.99
  6. Step 6: Final answer
    x = 4,593.10

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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.