Home / 15,787.69-21,787.31-8,713.96

Finding the Fourth Proportional to 15,787.69, 21,787.31 and 8,713.96

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Solution

The fourth proportional to 15,787.69, 21,787.31 and 8,713.96 is: 12,025.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.69 : 21,787.31 = 8,713.96 : x
  2. Step 2: Convert to fraction form
    15,787.69/21,787.31 = 8,713.96/x
  3. Step 3: Cross multiply
    15,787.69x = 21,787.31 × 8,713.96
  4. Step 4: Simplify right side
    15,787.69x = 189,853,715.16
  5. Step 5: Solve for x
    x = 189,853,715.16/15,787.69
  6. Step 6: Final answer
    x = 12,025.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.