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Finding the Fourth Proportional to 21,062.62, 31,593.84 and 8,579.86

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Solution

The fourth proportional to 21,062.62, 31,593.84 and 8,579.86 is: 12,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.62 : 31,593.84 = 8,579.86 : x
  2. Step 2: Convert to fraction form
    21,062.62/31,593.84 = 8,579.86/x
  3. Step 3: Cross multiply
    21,062.62x = 31,593.84 × 8,579.86
  4. Step 4: Simplify right side
    21,062.62x = 271,070,724.06
  5. Step 5: Solve for x
    x = 271,070,724.06/21,062.62
  6. Step 6: Final answer
    x = 12,869.75

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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.