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Finding the Fourth Proportional to 11,155, 15,393.90 and 6,187

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Solution

The fourth proportional to 11,155, 15,393.90 and 6,187 is: 8,538.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155 : 15,393.90 = 6,187 : x
  2. Step 2: Convert to fraction form
    11,155/15,393.90 = 6,187/x
  3. Step 3: Cross multiply
    11,155x = 15,393.90 × 6,187
  4. Step 4: Simplify right side
    11,155x = 95,242,059.30
  5. Step 5: Solve for x
    x = 95,242,059.30/11,155
  6. Step 6: Final answer
    x = 8,538.06

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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.