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Finding the Fourth Proportional to 16,651.12, 22,979.88 and 9,938.80

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Solution

The fourth proportional to 16,651.12, 22,979.88 and 9,938.80 is: 13,716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,651.12 : 22,979.88 = 9,938.80 : x
  2. Step 2: Convert to fraction form
    16,651.12/22,979.88 = 9,938.80/x
  3. Step 3: Cross multiply
    16,651.12x = 22,979.88 × 9,938.80
  4. Step 4: Simplify right side
    16,651.12x = 228,392,431.34
  5. Step 5: Solve for x
    x = 228,392,431.34/16,651.12
  6. Step 6: Final answer
    x = 13,716.34

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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.