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Finding the Fourth Proportional to 18,860.66, 28,252.11 and 11,045.78

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Solution

The fourth proportional to 18,860.66, 28,252.11 and 11,045.78 is: 16,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.66 : 28,252.11 = 11,045.78 : x
  2. Step 2: Convert to fraction form
    18,860.66/28,252.11 = 11,045.78/x
  3. Step 3: Cross multiply
    18,860.66x = 28,252.11 × 11,045.78
  4. Step 4: Simplify right side
    18,860.66x = 312,066,591.60
  5. Step 5: Solve for x
    x = 312,066,591.60/18,860.66
  6. Step 6: Final answer
    x = 16,545.90

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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.