Home / 12,787.60-19,179.84-3,428.32

Finding the Fourth Proportional to 12,787.60, 19,179.84 and 3,428.32

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Solution

The fourth proportional to 12,787.60, 19,179.84 and 3,428.32 is: 5,142.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.60 : 19,179.84 = 3,428.32 : x
  2. Step 2: Convert to fraction form
    12,787.60/19,179.84 = 3,428.32/x
  3. Step 3: Cross multiply
    12,787.60x = 19,179.84 × 3,428.32
  4. Step 4: Simplify right side
    12,787.60x = 65,754,629.07
  5. Step 5: Solve for x
    x = 65,754,629.07/12,787.60
  6. Step 6: Final answer
    x = 5,142.06

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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.