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Finding the Fourth Proportional to 18,355.68, 27,513.88 and 7,257.56

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Solution

The fourth proportional to 18,355.68, 27,513.88 and 7,257.56 is: 10,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,355.68 : 27,513.88 = 7,257.56 : x
  2. Step 2: Convert to fraction form
    18,355.68/27,513.88 = 7,257.56/x
  3. Step 3: Cross multiply
    18,355.68x = 27,513.88 × 7,257.56
  4. Step 4: Simplify right side
    18,355.68x = 199,683,634.93
  5. Step 5: Solve for x
    x = 199,683,634.93/18,355.68
  6. Step 6: Final answer
    x = 10,878.57

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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.