Home / 20,949.72-28,912.14-11,518.68

Finding the Fourth Proportional to 20,949.72, 28,912.14 and 11,518.68

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Solution

The fourth proportional to 20,949.72, 28,912.14 and 11,518.68 is: 15,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.72 : 28,912.14 = 11,518.68 : x
  2. Step 2: Convert to fraction form
    20,949.72/28,912.14 = 11,518.68/x
  3. Step 3: Cross multiply
    20,949.72x = 28,912.14 × 11,518.68
  4. Step 4: Simplify right side
    20,949.72x = 333,029,688.78
  5. Step 5: Solve for x
    x = 333,029,688.78/20,949.72
  6. Step 6: Final answer
    x = 15,896.62

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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.