Home / 11,111.90-16,647.60-8,787.20

Finding the Fourth Proportional to 11,111.90, 16,647.60 and 8,787.20

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Solution

The fourth proportional to 11,111.90, 16,647.60 and 8,787.20 is: 13,164.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,111.90 : 16,647.60 = 8,787.20 : x
  2. Step 2: Convert to fraction form
    11,111.90/16,647.60 = 8,787.20/x
  3. Step 3: Cross multiply
    11,111.90x = 16,647.60 × 8,787.20
  4. Step 4: Simplify right side
    11,111.90x = 146,285,790.72
  5. Step 5: Solve for x
    x = 146,285,790.72/11,111.90
  6. Step 6: Final answer
    x = 13,164.79

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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.