Home / 20,159.43-27,819.69-11,205.79

Finding the Fourth Proportional to 20,159.43, 27,819.69 and 11,205.79

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Solution

The fourth proportional to 20,159.43, 27,819.69 and 11,205.79 is: 15,463.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.43 : 27,819.69 = 11,205.79 : x
  2. Step 2: Convert to fraction form
    20,159.43/27,819.69 = 11,205.79/x
  3. Step 3: Cross multiply
    20,159.43x = 27,819.69 × 11,205.79
  4. Step 4: Simplify right side
    20,159.43x = 311,741,492.43
  5. Step 5: Solve for x
    x = 311,741,492.43/20,159.43
  6. Step 6: Final answer
    x = 15,463.81

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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.