Home / 39,991.78-59,990.86-13,696.75

Finding the Fourth Proportional to 39,991.78, 59,990.86 and 13,696.75

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Solution

The fourth proportional to 39,991.78, 59,990.86 and 13,696.75 is: 20,546.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.78 : 59,990.86 = 13,696.75 : x
  2. Step 2: Convert to fraction form
    39,991.78/59,990.86 = 13,696.75/x
  3. Step 3: Cross multiply
    39,991.78x = 59,990.86 × 13,696.75
  4. Step 4: Simplify right side
    39,991.78x = 821,679,811.71
  5. Step 5: Solve for x
    x = 821,679,811.71/39,991.78
  6. Step 6: Final answer
    x = 20,546.22

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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.