Home / 15,516.78-21,413.25-8,443.25

Finding the Fourth Proportional to 15,516.78, 21,413.25 and 8,443.25

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Solution

The fourth proportional to 15,516.78, 21,413.25 and 8,443.25 is: 11,651.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.78 : 21,413.25 = 8,443.25 : x
  2. Step 2: Convert to fraction form
    15,516.78/21,413.25 = 8,443.25/x
  3. Step 3: Cross multiply
    15,516.78x = 21,413.25 × 8,443.25
  4. Step 4: Simplify right side
    15,516.78x = 180,797,396.30
  5. Step 5: Solve for x
    x = 180,797,396.30/15,516.78
  6. Step 6: Final answer
    x = 11,651.74

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1.5x scale

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.