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Finding the Fourth Proportional to 18,934.11, 28,407.06 and 7,846.02

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Solution

The fourth proportional to 18,934.11, 28,407.06 and 7,846.02 is: 11,771.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.11 : 28,407.06 = 7,846.02 : x
  2. Step 2: Convert to fraction form
    18,934.11/28,407.06 = 7,846.02/x
  3. Step 3: Cross multiply
    18,934.11x = 28,407.06 × 7,846.02
  4. Step 4: Simplify right side
    18,934.11x = 222,882,360.90
  5. Step 5: Solve for x
    x = 222,882,360.90/18,934.11
  6. Step 6: Final answer
    x = 11,771.47

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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.