Home / 28,474.26-42,687.08-20,128.02

Finding the Fourth Proportional to 28,474.26, 42,687.08 and 20,128.02

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Solution

The fourth proportional to 28,474.26, 42,687.08 and 20,128.02 is: 30,174.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.26 : 42,687.08 = 20,128.02 : x
  2. Step 2: Convert to fraction form
    28,474.26/42,687.08 = 20,128.02/x
  3. Step 3: Cross multiply
    28,474.26x = 42,687.08 × 20,128.02
  4. Step 4: Simplify right side
    28,474.26x = 859,206,214.75
  5. Step 5: Solve for x
    x = 859,206,214.75/28,474.26
  6. Step 6: Final answer
    x = 30,174.84

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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.