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Finding the Fourth Proportional to 15,556.16, 21,468.78 and 8,843.90

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Solution

The fourth proportional to 15,556.16, 21,468.78 and 8,843.90 is: 12,205.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,556.16 : 21,468.78 = 8,843.90 : x
  2. Step 2: Convert to fraction form
    15,556.16/21,468.78 = 8,843.90/x
  3. Step 3: Cross multiply
    15,556.16x = 21,468.78 × 8,843.90
  4. Step 4: Simplify right side
    15,556.16x = 189,867,636.10
  5. Step 5: Solve for x
    x = 189,867,636.10/15,556.16
  6. Step 6: Final answer
    x = 12,205.30

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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.