Home / 20,135.20-27,788.16-11,183.52

Finding the Fourth Proportional to 20,135.20, 27,788.16 and 11,183.52

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Solution

The fourth proportional to 20,135.20, 27,788.16 and 11,183.52 is: 15,434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.20 : 27,788.16 = 11,183.52 : x
  2. Step 2: Convert to fraction form
    20,135.20/27,788.16 = 11,183.52/x
  3. Step 3: Cross multiply
    20,135.20x = 27,788.16 × 11,183.52
  4. Step 4: Simplify right side
    20,135.20x = 310,769,443.12
  5. Step 5: Solve for x
    x = 310,769,443.12/20,135.20
  6. Step 6: Final answer
    x = 15,434.14

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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.