Home / 13,721.29-20,541.84-12,408.06

Finding the Fourth Proportional to 13,721.29, 20,541.84 and 12,408.06

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Solution

The fourth proportional to 13,721.29, 20,541.84 and 12,408.06 is: 18,575.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.29 : 20,541.84 = 12,408.06 : x
  2. Step 2: Convert to fraction form
    13,721.29/20,541.84 = 12,408.06/x
  3. Step 3: Cross multiply
    13,721.29x = 20,541.84 × 12,408.06
  4. Step 4: Simplify right side
    13,721.29x = 254,884,413.73
  5. Step 5: Solve for x
    x = 254,884,413.73/13,721.29
  6. Step 6: Final answer
    x = 18,575.84

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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.