Home / 21,207.82-31,800.85-11,217.96

Finding the Fourth Proportional to 21,207.82, 31,800.85 and 11,217.96

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Solution

The fourth proportional to 21,207.82, 31,800.85 and 11,217.96 is: 16,821.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.82 : 31,800.85 = 11,217.96 : x
  2. Step 2: Convert to fraction form
    21,207.82/31,800.85 = 11,217.96/x
  3. Step 3: Cross multiply
    21,207.82x = 31,800.85 × 11,217.96
  4. Step 4: Simplify right side
    21,207.82x = 356,740,638.70
  5. Step 5: Solve for x
    x = 356,740,638.70/21,207.82
  6. Step 6: Final answer
    x = 16,821.18

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1.5x scale

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.