Home / 8,631.08-12,947.88-2,787.92

Finding the Fourth Proportional to 8,631.08, 12,947.88 and 2,787.92

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Solution

The fourth proportional to 8,631.08, 12,947.88 and 2,787.92 is: 4,182.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.08 : 12,947.88 = 2,787.92 : x
  2. Step 2: Convert to fraction form
    8,631.08/12,947.88 = 2,787.92/x
  3. Step 3: Cross multiply
    8,631.08x = 12,947.88 × 2,787.92
  4. Step 4: Simplify right side
    8,631.08x = 36,097,653.61
  5. Step 5: Solve for x
    x = 36,097,653.61/8,631.08
  6. Step 6: Final answer
    x = 4,182.29

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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.