Home / 20,721.14-28,594.20-11,767.48

Finding the Fourth Proportional to 20,721.14, 28,594.20 and 11,767.48

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Solution

The fourth proportional to 20,721.14, 28,594.20 and 11,767.48 is: 16,238.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.14 : 28,594.20 = 11,767.48 : x
  2. Step 2: Convert to fraction form
    20,721.14/28,594.20 = 11,767.48/x
  3. Step 3: Cross multiply
    20,721.14x = 28,594.20 × 11,767.48
  4. Step 4: Simplify right side
    20,721.14x = 336,481,676.62
  5. Step 5: Solve for x
    x = 336,481,676.62/20,721.14
  6. Step 6: Final answer
    x = 16,238.57

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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.