Home / 10,921.55-16,379.16-4,256.56

Finding the Fourth Proportional to 10,921.55, 16,379.16 and 4,256.56

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Solution

The fourth proportional to 10,921.55, 16,379.16 and 4,256.56 is: 6,383.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.55 : 16,379.16 = 4,256.56 : x
  2. Step 2: Convert to fraction form
    10,921.55/16,379.16 = 4,256.56/x
  3. Step 3: Cross multiply
    10,921.55x = 16,379.16 × 4,256.56
  4. Step 4: Simplify right side
    10,921.55x = 69,718,881.80
  5. Step 5: Solve for x
    x = 69,718,881.80/10,921.55
  6. Step 6: Final answer
    x = 6,383.61

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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.