Home / 20,695.50-30,993.84-11,911.96

Finding the Fourth Proportional to 20,695.50, 30,993.84 and 11,911.96

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Solution

The fourth proportional to 20,695.50, 30,993.84 and 11,911.96 is: 17,839.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.50 : 30,993.84 = 11,911.96 : x
  2. Step 2: Convert to fraction form
    20,695.50/30,993.84 = 11,911.96/x
  3. Step 3: Cross multiply
    20,695.50x = 30,993.84 × 11,911.96
  4. Step 4: Simplify right side
    20,695.50x = 369,197,421.07
  5. Step 5: Solve for x
    x = 369,197,421.07/20,695.50
  6. Step 6: Final answer
    x = 17,839.50

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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.