Home / 21,982.50-30,335.85-11,911

Finding the Fourth Proportional to 21,982.50, 30,335.85 and 11,911

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Solution

The fourth proportional to 21,982.50, 30,335.85 and 11,911 is: 16,437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.50 : 30,335.85 = 11,911 : x
  2. Step 2: Convert to fraction form
    21,982.50/30,335.85 = 11,911/x
  3. Step 3: Cross multiply
    21,982.50x = 30,335.85 × 11,911
  4. Step 4: Simplify right side
    21,982.50x = 361,330,309.35
  5. Step 5: Solve for x
    x = 361,330,309.35/21,982.50
  6. Step 6: Final answer
    x = 16,437.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.