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Finding the Fourth Proportional to 7,999.99, 12,006.40 and 3,617.82

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Solution

The fourth proportional to 7,999.99, 12,006.40 and 3,617.82 is: 5,429.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.99 : 12,006.40 = 3,617.82 : x
  2. Step 2: Convert to fraction form
    7,999.99/12,006.40 = 3,617.82/x
  3. Step 3: Cross multiply
    7,999.99x = 12,006.40 × 3,617.82
  4. Step 4: Simplify right side
    7,999.99x = 43,436,994.05
  5. Step 5: Solve for x
    x = 43,436,994.05/7,999.99
  6. Step 6: Final answer
    x = 5,429.63

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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.