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Finding the Fourth Proportional to 14,644.60, 20,212.13 and 8,679.56

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Solution

The fourth proportional to 14,644.60, 20,212.13 and 8,679.56 is: 11,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,644.60 : 20,212.13 = 8,679.56 : x
  2. Step 2: Convert to fraction form
    14,644.60/20,212.13 = 8,679.56/x
  3. Step 3: Cross multiply
    14,644.60x = 20,212.13 × 8,679.56
  4. Step 4: Simplify right side
    14,644.60x = 175,432,315.70
  5. Step 5: Solve for x
    x = 175,432,315.70/14,644.60
  6. Step 6: Final answer
    x = 11,979.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.