Home / 30,991.07-42,765.86-16,843.79

Finding the Fourth Proportional to 30,991.07, 42,765.86 and 16,843.79

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Solution

The fourth proportional to 30,991.07, 42,765.86 and 16,843.79 is: 23,243.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,991.07 : 42,765.86 = 16,843.79 : x
  2. Step 2: Convert to fraction form
    30,991.07/42,765.86 = 16,843.79/x
  3. Step 3: Cross multiply
    30,991.07x = 42,765.86 × 16,843.79
  4. Step 4: Simplify right side
    30,991.07x = 720,338,993.29
  5. Step 5: Solve for x
    x = 720,338,993.29/30,991.07
  6. Step 6: Final answer
    x = 23,243.44

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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.