Home / 20,155.79-27,813.70-11,202.75

Finding the Fourth Proportional to 20,155.79, 27,813.70 and 11,202.75

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Solution

The fourth proportional to 20,155.79, 27,813.70 and 11,202.75 is: 15,459.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.79 : 27,813.70 = 11,202.75 : x
  2. Step 2: Convert to fraction form
    20,155.79/27,813.70 = 11,202.75/x
  3. Step 3: Cross multiply
    20,155.79x = 27,813.70 × 11,202.75
  4. Step 4: Simplify right side
    20,155.79x = 311,589,927.68
  5. Step 5: Solve for x
    x = 311,589,927.68/20,155.79
  6. Step 6: Final answer
    x = 15,459.08

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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.