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Finding the Fourth Proportional to 12,479.85, 18,725.22 and 6,629.61

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Solution

The fourth proportional to 12,479.85, 18,725.22 and 6,629.61 is: 9,947.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.85 : 18,725.22 = 6,629.61 : x
  2. Step 2: Convert to fraction form
    12,479.85/18,725.22 = 6,629.61/x
  3. Step 3: Cross multiply
    12,479.85x = 18,725.22 × 6,629.61
  4. Step 4: Simplify right side
    12,479.85x = 124,140,905.76
  5. Step 5: Solve for x
    x = 124,140,905.76/12,479.85
  6. Step 6: Final answer
    x = 9,947.31

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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.