Home / 39,991.28-59,990.11-13,696.25

Finding the Fourth Proportional to 39,991.28, 59,990.11 and 13,696.25

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Solution

The fourth proportional to 39,991.28, 59,990.11 and 13,696.25 is: 20,545.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.28 : 59,990.11 = 13,696.25 : x
  2. Step 2: Convert to fraction form
    39,991.28/59,990.11 = 13,696.25/x
  3. Step 3: Cross multiply
    39,991.28x = 59,990.11 × 13,696.25
  4. Step 4: Simplify right side
    39,991.28x = 821,639,544.09
  5. Step 5: Solve for x
    x = 821,639,544.09/39,991.28
  6. Step 6: Final answer
    x = 20,545.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.