Home / 20,155.72-27,812.79-11,656.54

Finding the Fourth Proportional to 20,155.72, 27,812.79 and 11,656.54

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Solution

The fourth proportional to 20,155.72, 27,812.79 and 11,656.54 is: 16,084.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.72 : 27,812.79 = 11,656.54 : x
  2. Step 2: Convert to fraction form
    20,155.72/27,812.79 = 11,656.54/x
  3. Step 3: Cross multiply
    20,155.72x = 27,812.79 × 11,656.54
  4. Step 4: Simplify right side
    20,155.72x = 324,200,899.15
  5. Step 5: Solve for x
    x = 324,200,899.15/20,155.72
  6. Step 6: Final answer
    x = 16,084.81

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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.