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Finding the Fourth Proportional to 17,108.80, 25,639.20 and 13,604.80

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Solution

The fourth proportional to 17,108.80, 25,639.20 and 13,604.80 is: 20,388.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,108.80 : 25,639.20 = 13,604.80 : x
  2. Step 2: Convert to fraction form
    17,108.80/25,639.20 = 13,604.80/x
  3. Step 3: Cross multiply
    17,108.80x = 25,639.20 × 13,604.80
  4. Step 4: Simplify right side
    17,108.80x = 348,816,188.16
  5. Step 5: Solve for x
    x = 348,816,188.16/17,108.80
  6. Step 6: Final answer
    x = 20,388.12

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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.