Home / 18,819.51-28,235.44-7,731.42

Finding the Fourth Proportional to 18,819.51, 28,235.44 and 7,731.42

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Solution

The fourth proportional to 18,819.51, 28,235.44 and 7,731.42 is: 11,599.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.51 : 28,235.44 = 7,731.42 : x
  2. Step 2: Convert to fraction form
    18,819.51/28,235.44 = 7,731.42/x
  3. Step 3: Cross multiply
    18,819.51x = 28,235.44 × 7,731.42
  4. Step 4: Simplify right side
    18,819.51x = 218,300,006.87
  5. Step 5: Solve for x
    x = 218,300,006.87/18,819.51
  6. Step 6: Final answer
    x = 11,599.66

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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.