Home / 20,942.73-28,902.33-12,990.24

Finding the Fourth Proportional to 20,942.73, 28,902.33 and 12,990.24

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Solution

The fourth proportional to 20,942.73, 28,902.33 and 12,990.24 is: 17,927.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.73 : 28,902.33 = 12,990.24 : x
  2. Step 2: Convert to fraction form
    20,942.73/28,902.33 = 12,990.24/x
  3. Step 3: Cross multiply
    20,942.73x = 28,902.33 × 12,990.24
  4. Step 4: Simplify right side
    20,942.73x = 375,448,203.26
  5. Step 5: Solve for x
    x = 375,448,203.26/20,942.73
  6. Step 6: Final answer
    x = 17,927.38

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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.