Home / 8,990.11-13,464.69-7,939

Finding the Fourth Proportional to 8,990.11, 13,464.69 and 7,939

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Solution

The fourth proportional to 8,990.11, 13,464.69 and 7,939 is: 11,890.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.11 : 13,464.69 = 7,939 : x
  2. Step 2: Convert to fraction form
    8,990.11/13,464.69 = 7,939/x
  3. Step 3: Cross multiply
    8,990.11x = 13,464.69 × 7,939
  4. Step 4: Simplify right side
    8,990.11x = 106,896,173.91
  5. Step 5: Solve for x
    x = 106,896,173.91/8,990.11
  6. Step 6: Final answer
    x = 11,890.42

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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.