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Finding the Fourth Proportional to 8,605.95, 12,909.20 and 3,059.21

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Solution

The fourth proportional to 8,605.95, 12,909.20 and 3,059.21 is: 4,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.95 : 12,909.20 = 3,059.21 : x
  2. Step 2: Convert to fraction form
    8,605.95/12,909.20 = 3,059.21/x
  3. Step 3: Cross multiply
    8,605.95x = 12,909.20 × 3,059.21
  4. Step 4: Simplify right side
    8,605.95x = 39,491,873.89
  5. Step 5: Solve for x
    x = 39,491,873.89/8,605.95
  6. Step 6: Final answer
    x = 4,588.90

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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.