Home / 12,787.12-19,175.64-6,211.36

Finding the Fourth Proportional to 12,787.12, 19,175.64 and 6,211.36

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Solution

The fourth proportional to 12,787.12, 19,175.64 and 6,211.36 is: 9,314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.12 : 19,175.64 = 6,211.36 : x
  2. Step 2: Convert to fraction form
    12,787.12/19,175.64 = 6,211.36/x
  3. Step 3: Cross multiply
    12,787.12x = 19,175.64 × 6,211.36
  4. Step 4: Simplify right side
    12,787.12x = 119,106,803.27
  5. Step 5: Solve for x
    x = 119,106,803.27/12,787.12
  6. Step 6: Final answer
    x = 9,314.59

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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.