Home / 30,964.49-42,744.05-20,906.54

Finding the Fourth Proportional to 30,964.49, 42,744.05 and 20,906.54

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Solution

The fourth proportional to 30,964.49, 42,744.05 and 20,906.54 is: 28,859.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,964.49 : 42,744.05 = 20,906.54 : x
  2. Step 2: Convert to fraction form
    30,964.49/42,744.05 = 20,906.54/x
  3. Step 3: Cross multiply
    30,964.49x = 42,744.05 × 20,906.54
  4. Step 4: Simplify right side
    30,964.49x = 893,629,872.83
  5. Step 5: Solve for x
    x = 893,629,872.83/30,964.49
  6. Step 6: Final answer
    x = 28,859.83

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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.