Home / 20,155.14-27,768.69-15,111.45

Finding the Fourth Proportional to 20,155.14, 27,768.69 and 15,111.45

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Solution

The fourth proportional to 20,155.14, 27,768.69 and 15,111.45 is: 20,819.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.14 : 27,768.69 = 15,111.45 : x
  2. Step 2: Convert to fraction form
    20,155.14/27,768.69 = 15,111.45/x
  3. Step 3: Cross multiply
    20,155.14x = 27,768.69 × 15,111.45
  4. Step 4: Simplify right side
    20,155.14x = 419,625,170.50
  5. Step 5: Solve for x
    x = 419,625,170.50/20,155.14
  6. Step 6: Final answer
    x = 20,819.76

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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.