Home / 18,916.96-28,377.06-7,821.52

Finding the Fourth Proportional to 18,916.96, 28,377.06 and 7,821.52

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Solution

The fourth proportional to 18,916.96, 28,377.06 and 7,821.52 is: 11,732.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.96 : 28,377.06 = 7,821.52 : x
  2. Step 2: Convert to fraction form
    18,916.96/28,377.06 = 7,821.52/x
  3. Step 3: Cross multiply
    18,916.96x = 28,377.06 × 7,821.52
  4. Step 4: Simplify right side
    18,916.96x = 221,951,742.33
  5. Step 5: Solve for x
    x = 221,951,742.33/18,916.96
  6. Step 6: Final answer
    x = 11,732.95

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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.