Home / 20,940.21-31,428.54-11,086.56

Finding the Fourth Proportional to 20,940.21, 31,428.54 and 11,086.56

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Solution

The fourth proportional to 20,940.21, 31,428.54 and 11,086.56 is: 16,639.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.21 : 31,428.54 = 11,086.56 : x
  2. Step 2: Convert to fraction form
    20,940.21/31,428.54 = 11,086.56/x
  3. Step 3: Cross multiply
    20,940.21x = 31,428.54 × 11,086.56
  4. Step 4: Simplify right side
    20,940.21x = 348,434,394.42
  5. Step 5: Solve for x
    x = 348,434,394.42/20,940.21
  6. Step 6: Final answer
    x = 16,639.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.