Home / 39,895.75-55,055.82-21,990.43

Finding the Fourth Proportional to 39,895.75, 55,055.82 and 21,990.43

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Solution

The fourth proportional to 39,895.75, 55,055.82 and 21,990.43 is: 30,346.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.75 : 55,055.82 = 21,990.43 : x
  2. Step 2: Convert to fraction form
    39,895.75/55,055.82 = 21,990.43/x
  3. Step 3: Cross multiply
    39,895.75x = 55,055.82 × 21,990.43
  4. Step 4: Simplify right side
    39,895.75x = 1,210,701,155.80
  5. Step 5: Solve for x
    x = 1,210,701,155.80/39,895.75
  6. Step 6: Final answer
    x = 30,346.62

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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.