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Finding the Fourth Proportional to 8,949.12, 13,420.49 and 3,400.99

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Solution

The fourth proportional to 8,949.12, 13,420.49 and 3,400.99 is: 5,100.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,949.12 : 13,420.49 = 3,400.99 : x
  2. Step 2: Convert to fraction form
    8,949.12/13,420.49 = 3,400.99/x
  3. Step 3: Cross multiply
    8,949.12x = 13,420.49 × 3,400.99
  4. Step 4: Simplify right side
    8,949.12x = 45,642,901.73
  5. Step 5: Solve for x
    x = 45,642,901.73/8,949.12
  6. Step 6: Final answer
    x = 5,100.27

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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.