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Finding the Fourth Proportional to 12,166.80, 16,800.12 and 7,697.76

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Solution

The fourth proportional to 12,166.80, 16,800.12 and 7,697.76 is: 10,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,166.80 : 16,800.12 = 7,697.76 : x
  2. Step 2: Convert to fraction form
    12,166.80/16,800.12 = 7,697.76/x
  3. Step 3: Cross multiply
    12,166.80x = 16,800.12 × 7,697.76
  4. Step 4: Simplify right side
    12,166.80x = 129,323,291.73
  5. Step 5: Solve for x
    x = 129,323,291.73/12,166.80
  6. Step 6: Final answer
    x = 10,629.20

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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.