Home / 10,912.20-16,342.38-7,784.52

Finding the Fourth Proportional to 10,912.20, 16,342.38 and 7,784.52

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Solution

The fourth proportional to 10,912.20, 16,342.38 and 7,784.52 is: 11,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.20 : 16,342.38 = 7,784.52 : x
  2. Step 2: Convert to fraction form
    10,912.20/16,342.38 = 7,784.52/x
  3. Step 3: Cross multiply
    10,912.20x = 16,342.38 × 7,784.52
  4. Step 4: Simplify right side
    10,912.20x = 127,217,583.96
  5. Step 5: Solve for x
    x = 127,217,583.96/10,912.20
  6. Step 6: Final answer
    x = 11,658.29

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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.