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Finding the Fourth Proportional to 13,347.71, 20,021.31 and 3,987.75

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Solution

The fourth proportional to 13,347.71, 20,021.31 and 3,987.75 is: 5,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.71 : 20,021.31 = 3,987.75 : x
  2. Step 2: Convert to fraction form
    13,347.71/20,021.31 = 3,987.75/x
  3. Step 3: Cross multiply
    13,347.71x = 20,021.31 × 3,987.75
  4. Step 4: Simplify right side
    13,347.71x = 79,840,054.03
  5. Step 5: Solve for x
    x = 79,840,054.03/13,347.71
  6. Step 6: Final answer
    x = 5,981.56

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