Home / 16,890.20-23,310.79-9,719.96

Finding the Fourth Proportional to 16,890.20, 23,310.79 and 9,719.96

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Solution

The fourth proportional to 16,890.20, 23,310.79 and 9,719.96 is: 13,414.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,890.20 : 23,310.79 = 9,719.96 : x
  2. Step 2: Convert to fraction form
    16,890.20/23,310.79 = 9,719.96/x
  3. Step 3: Cross multiply
    16,890.20x = 23,310.79 × 9,719.96
  4. Step 4: Simplify right side
    16,890.20x = 226,579,897.77
  5. Step 5: Solve for x
    x = 226,579,897.77/16,890.20
  6. Step 6: Final answer
    x = 13,414.88

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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.