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Finding the Fourth Proportional to 11,123.25, 15,349.86 and 6,648

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Solution

The fourth proportional to 11,123.25, 15,349.86 and 6,648 is: 9,174.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.25 : 15,349.86 = 6,648 : x
  2. Step 2: Convert to fraction form
    11,123.25/15,349.86 = 6,648/x
  3. Step 3: Cross multiply
    11,123.25x = 15,349.86 × 6,648
  4. Step 4: Simplify right side
    11,123.25x = 102,045,869.28
  5. Step 5: Solve for x
    x = 102,045,869.28/11,123.25
  6. Step 6: Final answer
    x = 9,174.11

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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.