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Finding the Fourth Proportional to 28,327.90, 42,502.33 and 11,689.39

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Solution

The fourth proportional to 28,327.90, 42,502.33 and 11,689.39 is: 17,538.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,327.90 : 42,502.33 = 11,689.39 : x
  2. Step 2: Convert to fraction form
    28,327.90/42,502.33 = 11,689.39/x
  3. Step 3: Cross multiply
    28,327.90x = 42,502.33 × 11,689.39
  4. Step 4: Simplify right side
    28,327.90x = 496,826,311.28
  5. Step 5: Solve for x
    x = 496,826,311.28/28,327.90
  6. Step 6: Final answer
    x = 17,538.41

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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.