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Finding the Fourth Proportional to 39,991.48, 55,185.66 and 22,085.42

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Solution

The fourth proportional to 39,991.48, 55,185.66 and 22,085.42 is: 30,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.48 : 55,185.66 = 22,085.42 : x
  2. Step 2: Convert to fraction form
    39,991.48/55,185.66 = 22,085.42/x
  3. Step 3: Cross multiply
    39,991.48x = 55,185.66 × 22,085.42
  4. Step 4: Simplify right side
    39,991.48x = 1,218,798,479.08
  5. Step 5: Solve for x
    x = 1,218,798,479.08/39,991.48
  6. Step 6: Final answer
    x = 30,476.45

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.