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Finding the Fourth Proportional to 28,199.80, 42,320.37 and 22,719.31

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Solution

The fourth proportional to 28,199.80, 42,320.37 and 22,719.31 is: 34,095.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.80 : 42,320.37 = 22,719.31 : x
  2. Step 2: Convert to fraction form
    28,199.80/42,320.37 = 22,719.31/x
  3. Step 3: Cross multiply
    28,199.80x = 42,320.37 × 22,719.31
  4. Step 4: Simplify right side
    28,199.80x = 961,489,491.75
  5. Step 5: Solve for x
    x = 961,489,491.75/28,199.80
  6. Step 6: Final answer
    x = 34,095.62

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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.