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Finding the Fourth Proportional to 28,412.19, 42,620.22 and 9,687.33

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Solution

The fourth proportional to 28,412.19, 42,620.22 and 9,687.33 is: 14,531.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.19 : 42,620.22 = 9,687.33 : x
  2. Step 2: Convert to fraction form
    28,412.19/42,620.22 = 9,687.33/x
  3. Step 3: Cross multiply
    28,412.19x = 42,620.22 × 9,687.33
  4. Step 4: Simplify right side
    28,412.19x = 412,876,135.81
  5. Step 5: Solve for x
    x = 412,876,135.81/28,412.19
  6. Step 6: Final answer
    x = 14,531.65

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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.