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Finding the Fourth Proportional to 18,405.80, 27,605.98 and 6,719.02

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Solution

The fourth proportional to 18,405.80, 27,605.98 and 6,719.02 is: 10,077.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.80 : 27,605.98 = 6,719.02 : x
  2. Step 2: Convert to fraction form
    18,405.80/27,605.98 = 6,719.02/x
  3. Step 3: Cross multiply
    18,405.80x = 27,605.98 × 6,719.02
  4. Step 4: Simplify right side
    18,405.80x = 185,485,131.74
  5. Step 5: Solve for x
    x = 185,485,131.74/18,405.80
  6. Step 6: Final answer
    x = 10,077.54

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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.