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Finding the Fourth Proportional to 11,325.66, 16,986.21 and 3,930.42

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Solution

The fourth proportional to 11,325.66, 16,986.21 and 3,930.42 is: 5,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,325.66 : 16,986.21 = 3,930.42 : x
  2. Step 2: Convert to fraction form
    11,325.66/16,986.21 = 3,930.42/x
  3. Step 3: Cross multiply
    11,325.66x = 16,986.21 × 3,930.42
  4. Step 4: Simplify right side
    11,325.66x = 66,762,988.47
  5. Step 5: Solve for x
    x = 66,762,988.47/11,325.66
  6. Step 6: Final answer
    x = 5,894.85

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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.