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Finding the Fourth Proportional to 16,817.60, 25,215.60 and 6,960.80

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Solution

The fourth proportional to 16,817.60, 25,215.60 and 6,960.80 is: 10,436.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,817.60 : 25,215.60 = 6,960.80 : x
  2. Step 2: Convert to fraction form
    16,817.60/25,215.60 = 6,960.80/x
  3. Step 3: Cross multiply
    16,817.60x = 25,215.60 × 6,960.80
  4. Step 4: Simplify right side
    16,817.60x = 175,520,748.48
  5. Step 5: Solve for x
    x = 175,520,748.48/16,817.60
  6. Step 6: Final answer
    x = 10,436.73

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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.