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Finding the Fourth Proportional to 18,309.59, 27,445.92 and 7,211.99

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Solution

The fourth proportional to 18,309.59, 27,445.92 and 7,211.99 is: 10,810.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.59 : 27,445.92 = 7,211.99 : x
  2. Step 2: Convert to fraction form
    18,309.59/27,445.92 = 7,211.99/x
  3. Step 3: Cross multiply
    18,309.59x = 27,445.92 × 7,211.99
  4. Step 4: Simplify right side
    18,309.59x = 197,939,700.58
  5. Step 5: Solve for x
    x = 197,939,700.58/18,309.59
  6. Step 6: Final answer
    x = 10,810.71

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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.