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Finding the Fourth Proportional to 21,672.48, 32,505.40 and 6,879.48

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Solution

The fourth proportional to 21,672.48, 32,505.40 and 6,879.48 is: 10,318.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.48 : 32,505.40 = 6,879.48 : x
  2. Step 2: Convert to fraction form
    21,672.48/32,505.40 = 6,879.48/x
  3. Step 3: Cross multiply
    21,672.48x = 32,505.40 × 6,879.48
  4. Step 4: Simplify right side
    21,672.48x = 223,620,249.19
  5. Step 5: Solve for x
    x = 223,620,249.19/21,672.48
  6. Step 6: Final answer
    x = 10,318.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.