Home / 12,787.61-19,179.32-9,078.62

Finding the Fourth Proportional to 12,787.61, 19,179.32 and 9,078.62

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Solution

The fourth proportional to 12,787.61, 19,179.32 and 9,078.62 is: 13,616.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.61 : 19,179.32 = 9,078.62 : x
  2. Step 2: Convert to fraction form
    12,787.61/19,179.32 = 9,078.62/x
  3. Step 3: Cross multiply
    12,787.61x = 19,179.32 × 9,078.62
  4. Step 4: Simplify right side
    12,787.61x = 174,121,616.85
  5. Step 5: Solve for x
    x = 174,121,616.85/12,787.61
  6. Step 6: Final answer
    x = 13,616.44

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1.5x scale

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.