Home / 20,689.17-28,551.06-11,257.73

Finding the Fourth Proportional to 20,689.17, 28,551.06 and 11,257.73

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Solution

The fourth proportional to 20,689.17, 28,551.06 and 11,257.73 is: 15,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.17 : 28,551.06 = 11,257.73 : x
  2. Step 2: Convert to fraction form
    20,689.17/28,551.06 = 11,257.73/x
  3. Step 3: Cross multiply
    20,689.17x = 28,551.06 × 11,257.73
  4. Step 4: Simplify right side
    20,689.17x = 321,420,217.94
  5. Step 5: Solve for x
    x = 321,420,217.94/20,689.17
  6. Step 6: Final answer
    x = 15,535.67

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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.