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Finding the Fourth Proportional to 21,062.71, 31,593.44 and 8,579.64

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Solution

The fourth proportional to 21,062.71, 31,593.44 and 8,579.64 is: 12,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.71 : 31,593.44 = 8,579.64 : x
  2. Step 2: Convert to fraction form
    21,062.71/31,593.44 = 8,579.64/x
  3. Step 3: Cross multiply
    21,062.71x = 31,593.44 × 8,579.64
  4. Step 4: Simplify right side
    21,062.71x = 271,060,341.56
  5. Step 5: Solve for x
    x = 271,060,341.56/21,062.71
  6. Step 6: Final answer
    x = 12,869.21

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.