Home / 18,942.80-28,414.16-5,091.80

Finding the Fourth Proportional to 18,942.80, 28,414.16 and 5,091.80

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Solution

The fourth proportional to 18,942.80, 28,414.16 and 5,091.80 is: 7,637.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.80 : 28,414.16 = 5,091.80 : x
  2. Step 2: Convert to fraction form
    18,942.80/28,414.16 = 5,091.80/x
  3. Step 3: Cross multiply
    18,942.80x = 28,414.16 × 5,091.80
  4. Step 4: Simplify right side
    18,942.80x = 144,679,219.89
  5. Step 5: Solve for x
    x = 144,679,219.89/18,942.80
  6. Step 6: Final answer
    x = 7,637.69

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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.