Home / 8,619.31-12,916.81-3,927.79

Finding the Fourth Proportional to 8,619.31, 12,916.81 and 3,927.79

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Solution

The fourth proportional to 8,619.31, 12,916.81 and 3,927.79 is: 5,886.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.31 : 12,916.81 = 3,927.79 : x
  2. Step 2: Convert to fraction form
    8,619.31/12,916.81 = 3,927.79/x
  3. Step 3: Cross multiply
    8,619.31x = 12,916.81 × 3,927.79
  4. Step 4: Simplify right side
    8,619.31x = 50,734,517.15
  5. Step 5: Solve for x
    x = 50,734,517.15/8,619.31
  6. Step 6: Final answer
    x = 5,886.15

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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.