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Finding the Fourth Proportional to 28,649.70, 42,895.17 and 21,608.37

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Solution

The fourth proportional to 28,649.70, 42,895.17 and 21,608.37 is: 32,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.70 : 42,895.17 = 21,608.37 : x
  2. Step 2: Convert to fraction form
    28,649.70/42,895.17 = 21,608.37/x
  3. Step 3: Cross multiply
    28,649.70x = 42,895.17 × 21,608.37
  4. Step 4: Simplify right side
    28,649.70x = 926,894,704.57
  5. Step 5: Solve for x
    x = 926,894,704.57/28,649.70
  6. Step 6: Final answer
    x = 32,352.68

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Why These Related Problems?

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