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Finding the Fourth Proportional to 28,168.70, 42,252.55 and 11,306

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Solution

The fourth proportional to 28,168.70, 42,252.55 and 11,306 is: 16,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.70 : 42,252.55 = 11,306 : x
  2. Step 2: Convert to fraction form
    28,168.70/42,252.55 = 11,306/x
  3. Step 3: Cross multiply
    28,168.70x = 42,252.55 × 11,306
  4. Step 4: Simplify right side
    28,168.70x = 477,707,330.30
  5. Step 5: Solve for x
    x = 477,707,330.30/28,168.70
  6. Step 6: Final answer
    x = 16,958.80

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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.