Home / 20,986.11-31,479.27-7,838.37

Finding the Fourth Proportional to 20,986.11, 31,479.27 and 7,838.37

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Solution

The fourth proportional to 20,986.11, 31,479.27 and 7,838.37 is: 11,757.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.11 : 31,479.27 = 7,838.37 : x
  2. Step 2: Convert to fraction form
    20,986.11/31,479.27 = 7,838.37/x
  3. Step 3: Cross multiply
    20,986.11x = 31,479.27 × 7,838.37
  4. Step 4: Simplify right side
    20,986.11x = 246,746,165.59
  5. Step 5: Solve for x
    x = 246,746,165.59/20,986.11
  6. Step 6: Final answer
    x = 11,757.59

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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.