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Finding the Fourth Proportional to 16,990.11, 23,446.49 and 9,915.15

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Solution

The fourth proportional to 16,990.11, 23,446.49 and 9,915.15 is: 13,682.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,990.11 : 23,446.49 = 9,915.15 : x
  2. Step 2: Convert to fraction form
    16,990.11/23,446.49 = 9,915.15/x
  3. Step 3: Cross multiply
    16,990.11x = 23,446.49 × 9,915.15
  4. Step 4: Simplify right side
    16,990.11x = 232,475,372.88
  5. Step 5: Solve for x
    x = 232,475,372.88/16,990.11
  6. Step 6: Final answer
    x = 13,682.99

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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.