Home / 11,157.78-15,398.19-6,680.64

Finding the Fourth Proportional to 11,157.78, 15,398.19 and 6,680.64

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Solution

The fourth proportional to 11,157.78, 15,398.19 and 6,680.64 is: 9,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,157.78 : 15,398.19 = 6,680.64 : x
  2. Step 2: Convert to fraction form
    11,157.78/15,398.19 = 6,680.64/x
  3. Step 3: Cross multiply
    11,157.78x = 15,398.19 × 6,680.64
  4. Step 4: Simplify right side
    11,157.78x = 102,869,764.04
  5. Step 5: Solve for x
    x = 102,869,764.04/11,157.78
  6. Step 6: Final answer
    x = 9,219.55

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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.