Home / 20,813.17-28,722.32-11,381.89

Finding the Fourth Proportional to 20,813.17, 28,722.32 and 11,381.89

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Solution

The fourth proportional to 20,813.17, 28,722.32 and 11,381.89 is: 15,707.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.17 : 28,722.32 = 11,381.89 : x
  2. Step 2: Convert to fraction form
    20,813.17/28,722.32 = 11,381.89/x
  3. Step 3: Cross multiply
    20,813.17x = 28,722.32 × 11,381.89
  4. Step 4: Simplify right side
    20,813.17x = 326,914,286.78
  5. Step 5: Solve for x
    x = 326,914,286.78/20,813.17
  6. Step 6: Final answer
    x = 15,707.09

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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.