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Finding the Fourth Proportional to 12,311.64, 16,990.11 and 7,006.41

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Solution

The fourth proportional to 12,311.64, 16,990.11 and 7,006.41 is: 9,668.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.64 : 16,990.11 = 7,006.41 : x
  2. Step 2: Convert to fraction form
    12,311.64/16,990.11 = 7,006.41/x
  3. Step 3: Cross multiply
    12,311.64x = 16,990.11 × 7,006.41
  4. Step 4: Simplify right side
    12,311.64x = 119,039,676.61
  5. Step 5: Solve for x
    x = 119,039,676.61/12,311.64
  6. Step 6: Final answer
    x = 9,668.87

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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.