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Finding the Fourth Proportional to 18,381.80, 27,561.69 and 7,293.71

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Solution

The fourth proportional to 18,381.80, 27,561.69 and 7,293.71 is: 10,936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.80 : 27,561.69 = 7,293.71 : x
  2. Step 2: Convert to fraction form
    18,381.80/27,561.69 = 7,293.71/x
  3. Step 3: Cross multiply
    18,381.80x = 27,561.69 × 7,293.71
  4. Step 4: Simplify right side
    18,381.80x = 201,026,836.16
  5. Step 5: Solve for x
    x = 201,026,836.16/18,381.80
  6. Step 6: Final answer
    x = 10,936.19

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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.