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Finding the Fourth Proportional to 12,479.88, 18,714.78 and 6,237.48

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Solution

The fourth proportional to 12,479.88, 18,714.78 and 6,237.48 is: 9,353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.88 : 18,714.78 = 6,237.48 : x
  2. Step 2: Convert to fraction form
    12,479.88/18,714.78 = 6,237.48/x
  3. Step 3: Cross multiply
    12,479.88x = 18,714.78 × 6,237.48
  4. Step 4: Simplify right side
    12,479.88x = 116,733,065.95
  5. Step 5: Solve for x
    x = 116,733,065.95/12,479.88
  6. Step 6: Final answer
    x = 9,353.70

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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.