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Finding the Fourth Proportional to 21,911.48, 32,895.48 and 18,811.42

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Solution

The fourth proportional to 21,911.48, 32,895.48 and 18,811.42 is: 28,241.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.48 : 32,895.48 = 18,811.42 : x
  2. Step 2: Convert to fraction form
    21,911.48/32,895.48 = 18,811.42/x
  3. Step 3: Cross multiply
    21,911.48x = 32,895.48 × 18,811.42
  4. Step 4: Simplify right side
    21,911.48x = 618,810,690.38
  5. Step 5: Solve for x
    x = 618,810,690.38/21,911.48
  6. Step 6: Final answer
    x = 28,241.39

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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.