Home / 12,108.66-18,126.78-7,413.90

Finding the Fourth Proportional to 12,108.66, 18,126.78 and 7,413.90

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Solution

The fourth proportional to 12,108.66, 18,126.78 and 7,413.90 is: 11,098.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.66 : 18,126.78 = 7,413.90 : x
  2. Step 2: Convert to fraction form
    12,108.66/18,126.78 = 7,413.90/x
  3. Step 3: Cross multiply
    12,108.66x = 18,126.78 × 7,413.90
  4. Step 4: Simplify right side
    12,108.66x = 134,390,134.24
  5. Step 5: Solve for x
    x = 134,390,134.24/12,108.66
  6. Step 6: Final answer
    x = 11,098.68

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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.