Home / 20,813.22-28,722.06-11,381.85

Finding the Fourth Proportional to 20,813.22, 28,722.06 and 11,381.85

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Solution

The fourth proportional to 20,813.22, 28,722.06 and 11,381.85 is: 15,706.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.22 : 28,722.06 = 11,381.85 : x
  2. Step 2: Convert to fraction form
    20,813.22/28,722.06 = 11,381.85/x
  3. Step 3: Cross multiply
    20,813.22x = 28,722.06 × 11,381.85
  4. Step 4: Simplify right side
    20,813.22x = 326,910,178.61
  5. Step 5: Solve for x
    x = 326,910,178.61/20,813.22
  6. Step 6: Final answer
    x = 15,706.85

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1.5x scale

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.