Home / 10,426.90-15,640.38-5,231.56

Finding the Fourth Proportional to 10,426.90, 15,640.38 and 5,231.56

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Solution

The fourth proportional to 10,426.90, 15,640.38 and 5,231.56 is: 7,847.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,426.90 : 15,640.38 = 5,231.56 : x
  2. Step 2: Convert to fraction form
    10,426.90/15,640.38 = 5,231.56/x
  3. Step 3: Cross multiply
    10,426.90x = 15,640.38 × 5,231.56
  4. Step 4: Simplify right side
    10,426.90x = 81,823,586.39
  5. Step 5: Solve for x
    x = 81,823,586.39/10,426.90
  6. Step 6: Final answer
    x = 7,847.36

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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.