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Finding the Fourth Proportional to 17,168.80, 25,720.80 and 8,820.40

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Solution

The fourth proportional to 17,168.80, 25,720.80 and 8,820.40 is: 13,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,168.80 : 25,720.80 = 8,820.40 : x
  2. Step 2: Convert to fraction form
    17,168.80/25,720.80 = 8,820.40/x
  3. Step 3: Cross multiply
    17,168.80x = 25,720.80 × 8,820.40
  4. Step 4: Simplify right side
    17,168.80x = 226,867,744.32
  5. Step 5: Solve for x
    x = 226,867,744.32/17,168.80
  6. Step 6: Final answer
    x = 13,213.95

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1.5x scale

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.