Home / 20,954.31-28,917.01-11,394.20

Finding the Fourth Proportional to 20,954.31, 28,917.01 and 11,394.20

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Solution

The fourth proportional to 20,954.31, 28,917.01 and 11,394.20 is: 15,724.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.31 : 28,917.01 = 11,394.20 : x
  2. Step 2: Convert to fraction form
    20,954.31/28,917.01 = 11,394.20/x
  3. Step 3: Cross multiply
    20,954.31x = 28,917.01 × 11,394.20
  4. Step 4: Simplify right side
    20,954.31x = 329,486,195.34
  5. Step 5: Solve for x
    x = 329,486,195.34/20,954.31
  6. Step 6: Final answer
    x = 15,724.03

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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.