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Finding the Fourth Proportional to 11,255, 15,531.90 and 6,287

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Solution

The fourth proportional to 11,255, 15,531.90 and 6,287 is: 8,676.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,255 : 15,531.90 = 6,287 : x
  2. Step 2: Convert to fraction form
    11,255/15,531.90 = 6,287/x
  3. Step 3: Cross multiply
    11,255x = 15,531.90 × 6,287
  4. Step 4: Simplify right side
    11,255x = 97,649,055.30
  5. Step 5: Solve for x
    x = 97,649,055.30/11,255
  6. Step 6: Final answer
    x = 8,676.06

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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.