Home / 15,516.63-21,413.16-8,442.90

Finding the Fourth Proportional to 15,516.63, 21,413.16 and 8,442.90

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Solution

The fourth proportional to 15,516.63, 21,413.16 and 8,442.90 is: 11,651.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.63 : 21,413.16 = 8,442.90 : x
  2. Step 2: Convert to fraction form
    15,516.63/21,413.16 = 8,442.90/x
  3. Step 3: Cross multiply
    15,516.63x = 21,413.16 × 8,442.90
  4. Step 4: Simplify right side
    15,516.63x = 180,789,168.56
  5. Step 5: Solve for x
    x = 180,789,168.56/15,516.63
  6. Step 6: Final answer
    x = 11,651.32

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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.