Home / 20,919.11-31,376.21-7,767.95

Finding the Fourth Proportional to 20,919.11, 31,376.21 and 7,767.95

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Solution

The fourth proportional to 20,919.11, 31,376.21 and 7,767.95 is: 11,651.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.11 : 31,376.21 = 7,767.95 : x
  2. Step 2: Convert to fraction form
    20,919.11/31,376.21 = 7,767.95/x
  3. Step 3: Cross multiply
    20,919.11x = 31,376.21 × 7,767.95
  4. Step 4: Simplify right side
    20,919.11x = 243,728,634.75
  5. Step 5: Solve for x
    x = 243,728,634.75/20,919.11
  6. Step 6: Final answer
    x = 11,651.01

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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.