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Finding the Fourth Proportional to 12,579.23, 18,871.11 and 5,179.57

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Solution

The fourth proportional to 12,579.23, 18,871.11 and 5,179.57 is: 7,770.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.23 : 18,871.11 = 5,179.57 : x
  2. Step 2: Convert to fraction form
    12,579.23/18,871.11 = 5,179.57/x
  3. Step 3: Cross multiply
    12,579.23x = 18,871.11 × 5,179.57
  4. Step 4: Simplify right side
    12,579.23x = 97,744,188.04
  5. Step 5: Solve for x
    x = 97,744,188.04/12,579.23
  6. Step 6: Final answer
    x = 7,770.28

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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.