Home / 20,439.50-28,205.54-11,942.06

Finding the Fourth Proportional to 20,439.50, 28,205.54 and 11,942.06

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Solution

The fourth proportional to 20,439.50, 28,205.54 and 11,942.06 is: 16,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.50 : 28,205.54 = 11,942.06 : x
  2. Step 2: Convert to fraction form
    20,439.50/28,205.54 = 11,942.06/x
  3. Step 3: Cross multiply
    20,439.50x = 28,205.54 × 11,942.06
  4. Step 4: Simplify right side
    20,439.50x = 336,832,251.01
  5. Step 5: Solve for x
    x = 336,832,251.01/20,439.50
  6. Step 6: Final answer
    x = 16,479.48

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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.