Home / 20,787.41-28,686.62-11,227.30

Finding the Fourth Proportional to 20,787.41, 28,686.62 and 11,227.30

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Solution

The fourth proportional to 20,787.41, 28,686.62 and 11,227.30 is: 15,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.41 : 28,686.62 = 11,227.30 : x
  2. Step 2: Convert to fraction form
    20,787.41/28,686.62 = 11,227.30/x
  3. Step 3: Cross multiply
    20,787.41x = 28,686.62 × 11,227.30
  4. Step 4: Simplify right side
    20,787.41x = 322,073,288.73
  5. Step 5: Solve for x
    x = 322,073,288.73/20,787.41
  6. Step 6: Final answer
    x = 15,493.67

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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.