Home / 21,001.98-28,982.64-11,442.42

Finding the Fourth Proportional to 21,001.98, 28,982.64 and 11,442.42

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Solution

The fourth proportional to 21,001.98, 28,982.64 and 11,442.42 is: 15,790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.98 : 28,982.64 = 11,442.42 : x
  2. Step 2: Convert to fraction form
    21,001.98/28,982.64 = 11,442.42/x
  3. Step 3: Cross multiply
    21,001.98x = 28,982.64 × 11,442.42
  4. Step 4: Simplify right side
    21,001.98x = 331,631,539.59
  5. Step 5: Solve for x
    x = 331,631,539.59/21,001.98
  6. Step 6: Final answer
    x = 15,790.49

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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.