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Finding the Fourth Proportional to 18,420.11, 27,609.51 and 7,323.82

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Solution

The fourth proportional to 18,420.11, 27,609.51 and 7,323.82 is: 10,977.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.11 : 27,609.51 = 7,323.82 : x
  2. Step 2: Convert to fraction form
    18,420.11/27,609.51 = 7,323.82/x
  3. Step 3: Cross multiply
    18,420.11x = 27,609.51 × 7,323.82
  4. Step 4: Simplify right side
    18,420.11x = 202,206,998.77
  5. Step 5: Solve for x
    x = 202,206,998.77/18,420.11
  6. Step 6: Final answer
    x = 10,977.51

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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.