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Finding the Fourth Proportional to 12,173.80, 16,809.78 and 7,704.76

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Solution

The fourth proportional to 12,173.80, 16,809.78 and 7,704.76 is: 10,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,173.80 : 16,809.78 = 7,704.76 : x
  2. Step 2: Convert to fraction form
    12,173.80/16,809.78 = 7,704.76/x
  3. Step 3: Cross multiply
    12,173.80x = 16,809.78 × 7,704.76
  4. Step 4: Simplify right side
    12,173.80x = 129,515,320.55
  5. Step 5: Solve for x
    x = 129,515,320.55/12,173.80
  6. Step 6: Final answer
    x = 10,638.86

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Half scale
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Double scale
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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.