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Finding the Fourth Proportional to 18,486.96, 27,732.73 and 7,240.84

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Solution

The fourth proportional to 18,486.96, 27,732.73 and 7,240.84 is: 10,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.96 : 27,732.73 = 7,240.84 : x
  2. Step 2: Convert to fraction form
    18,486.96/27,732.73 = 7,240.84/x
  3. Step 3: Cross multiply
    18,486.96x = 27,732.73 × 7,240.84
  4. Step 4: Simplify right side
    18,486.96x = 200,808,260.69
  5. Step 5: Solve for x
    x = 200,808,260.69/18,486.96
  6. Step 6: Final answer
    x = 10,862.16

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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.