Home / 28,489.92-42,743.52-20,185.98

Finding the Fourth Proportional to 28,489.92, 42,743.52 and 20,185.98

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Solution

The fourth proportional to 28,489.92, 42,743.52 and 20,185.98 is: 30,285.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.92 : 42,743.52 = 20,185.98 : x
  2. Step 2: Convert to fraction form
    28,489.92/42,743.52 = 20,185.98/x
  3. Step 3: Cross multiply
    28,489.92x = 42,743.52 × 20,185.98
  4. Step 4: Simplify right side
    28,489.92x = 862,819,839.85
  5. Step 5: Solve for x
    x = 862,819,839.85/28,489.92
  6. Step 6: Final answer
    x = 30,285.09

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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.