Home / 11,399.40-15,731.16-6,921.96

Finding the Fourth Proportional to 11,399.40, 15,731.16 and 6,921.96

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Solution

The fourth proportional to 11,399.40, 15,731.16 and 6,921.96 is: 9,552.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.40 : 15,731.16 = 6,921.96 : x
  2. Step 2: Convert to fraction form
    11,399.40/15,731.16 = 6,921.96/x
  3. Step 3: Cross multiply
    11,399.40x = 15,731.16 × 6,921.96
  4. Step 4: Simplify right side
    11,399.40x = 108,890,460.27
  5. Step 5: Solve for x
    x = 108,890,460.27/11,399.40
  6. Step 6: Final answer
    x = 9,552.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.