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Finding the Fourth Proportional to 12,468.72, 18,686.88 and 10,879.56

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Solution

The fourth proportional to 12,468.72, 18,686.88 and 10,879.56 is: 16,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,468.72 : 18,686.88 = 10,879.56 : x
  2. Step 2: Convert to fraction form
    12,468.72/18,686.88 = 10,879.56/x
  3. Step 3: Cross multiply
    12,468.72x = 18,686.88 × 10,879.56
  4. Step 4: Simplify right side
    12,468.72x = 203,305,032.17
  5. Step 5: Solve for x
    x = 203,305,032.17/12,468.72
  6. Step 6: Final answer
    x = 16,305.20

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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.