Home / 12,656.38-18,986.60-6,413.87

Finding the Fourth Proportional to 12,656.38, 18,986.60 and 6,413.87

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Solution

The fourth proportional to 12,656.38, 18,986.60 and 6,413.87 is: 9,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.38 : 18,986.60 = 6,413.87 : x
  2. Step 2: Convert to fraction form
    12,656.38/18,986.60 = 6,413.87/x
  3. Step 3: Cross multiply
    12,656.38x = 18,986.60 × 6,413.87
  4. Step 4: Simplify right side
    12,656.38x = 121,777,473.17
  5. Step 5: Solve for x
    x = 121,777,473.17/12,656.38
  6. Step 6: Final answer
    x = 9,621.82

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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.