Home / 15,516.53-21,413.87-8,802.20

Finding the Fourth Proportional to 15,516.53, 21,413.87 and 8,802.20

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Solution

The fourth proportional to 15,516.53, 21,413.87 and 8,802.20 is: 12,147.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.53 : 21,413.87 = 8,802.20 : x
  2. Step 2: Convert to fraction form
    15,516.53/21,413.87 = 8,802.20/x
  3. Step 3: Cross multiply
    15,516.53x = 21,413.87 × 8,802.20
  4. Step 4: Simplify right side
    15,516.53x = 188,489,209.05
  5. Step 5: Solve for x
    x = 188,489,209.05/15,516.53
  6. Step 6: Final answer
    x = 12,147.64

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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.