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Finding the Fourth Proportional to 16,821.64, 23,214.90 and 9,369.64

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Solution

The fourth proportional to 16,821.64, 23,214.90 and 9,369.64 is: 12,930.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821.64 : 23,214.90 = 9,369.64 : x
  2. Step 2: Convert to fraction form
    16,821.64/23,214.90 = 9,369.64/x
  3. Step 3: Cross multiply
    16,821.64x = 23,214.90 × 9,369.64
  4. Step 4: Simplify right side
    16,821.64x = 217,515,255.64
  5. Step 5: Solve for x
    x = 217,515,255.64/16,821.64
  6. Step 6: Final answer
    x = 12,930.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.