Home / 21,083.61-29,099.49-13,539.48

Finding the Fourth Proportional to 21,083.61, 29,099.49 and 13,539.48

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Solution

The fourth proportional to 21,083.61, 29,099.49 and 13,539.48 is: 18,687.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.61 : 29,099.49 = 13,539.48 : x
  2. Step 2: Convert to fraction form
    21,083.61/29,099.49 = 13,539.48/x
  3. Step 3: Cross multiply
    21,083.61x = 29,099.49 × 13,539.48
  4. Step 4: Simplify right side
    21,083.61x = 393,991,962.87
  5. Step 5: Solve for x
    x = 393,991,962.87/21,083.61
  6. Step 6: Final answer
    x = 18,687.12

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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.