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Finding the Fourth Proportional to 12,479.39, 18,735.42 and 8,345.96

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Solution

The fourth proportional to 12,479.39, 18,735.42 and 8,345.96 is: 12,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.39 : 18,735.42 = 8,345.96 : x
  2. Step 2: Convert to fraction form
    12,479.39/18,735.42 = 8,345.96/x
  3. Step 3: Cross multiply
    12,479.39x = 18,735.42 × 8,345.96
  4. Step 4: Simplify right side
    12,479.39x = 156,364,972.23
  5. Step 5: Solve for x
    x = 156,364,972.23/12,479.39
  6. Step 6: Final answer
    x = 12,529.86

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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.