Home / 20,771.97-28,665.81-11,340.60

Finding the Fourth Proportional to 20,771.97, 28,665.81 and 11,340.60

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Solution

The fourth proportional to 20,771.97, 28,665.81 and 11,340.60 is: 15,650.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.97 : 28,665.81 = 11,340.60 : x
  2. Step 2: Convert to fraction form
    20,771.97/28,665.81 = 11,340.60/x
  3. Step 3: Cross multiply
    20,771.97x = 28,665.81 × 11,340.60
  4. Step 4: Simplify right side
    20,771.97x = 325,087,484.89
  5. Step 5: Solve for x
    x = 325,087,484.89/20,771.97
  6. Step 6: Final answer
    x = 15,650.30

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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.