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Finding the Fourth Proportional to 12,218.58, 16,861.68 and 6,629.58

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Solution

The fourth proportional to 12,218.58, 16,861.68 and 6,629.58 is: 9,148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.58 : 16,861.68 = 6,629.58 : x
  2. Step 2: Convert to fraction form
    12,218.58/16,861.68 = 6,629.58/x
  3. Step 3: Cross multiply
    12,218.58x = 16,861.68 × 6,629.58
  4. Step 4: Simplify right side
    12,218.58x = 111,785,856.49
  5. Step 5: Solve for x
    x = 111,785,856.49/12,218.58
  6. Step 6: Final answer
    x = 9,148.84

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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.