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Finding the Fourth Proportional to 18,636.99, 27,955.49 and 12,775.83

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Solution

The fourth proportional to 18,636.99, 27,955.49 and 12,775.83 is: 19,163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.99 : 27,955.49 = 12,775.83 : x
  2. Step 2: Convert to fraction form
    18,636.99/27,955.49 = 12,775.83/x
  3. Step 3: Cross multiply
    18,636.99x = 27,955.49 × 12,775.83
  4. Step 4: Simplify right side
    18,636.99x = 357,154,523.93
  5. Step 5: Solve for x
    x = 357,154,523.93/18,636.99
  6. Step 6: Final answer
    x = 19,163.75

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Similar ratio
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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.