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Finding the Fourth Proportional to 28,615.68, 39,491.28 and 16,039.44

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Solution

The fourth proportional to 28,615.68, 39,491.28 and 16,039.44 is: 22,135.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.68 : 39,491.28 = 16,039.44 : x
  2. Step 2: Convert to fraction form
    28,615.68/39,491.28 = 16,039.44/x
  3. Step 3: Cross multiply
    28,615.68x = 39,491.28 × 16,039.44
  4. Step 4: Simplify right side
    28,615.68x = 633,418,016.08
  5. Step 5: Solve for x
    x = 633,418,016.08/28,615.68
  6. Step 6: Final answer
    x = 22,135.35

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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.