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Finding the Fourth Proportional to 12,676.80, 18,999.36 and 8,749.92

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Solution

The fourth proportional to 12,676.80, 18,999.36 and 8,749.92 is: 13,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.80 : 18,999.36 = 8,749.92 : x
  2. Step 2: Convert to fraction form
    12,676.80/18,999.36 = 8,749.92/x
  3. Step 3: Cross multiply
    12,676.80x = 18,999.36 × 8,749.92
  4. Step 4: Simplify right side
    12,676.80x = 166,242,880.05
  5. Step 5: Solve for x
    x = 166,242,880.05/12,676.80
  6. Step 6: Final answer
    x = 13,113.95

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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.