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Finding the Fourth Proportional to 14,993.79, 20,691.29 and 8,279.28

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Solution

The fourth proportional to 14,993.79, 20,691.29 and 8,279.28 is: 11,425.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993.79 : 20,691.29 = 8,279.28 : x
  2. Step 2: Convert to fraction form
    14,993.79/20,691.29 = 8,279.28/x
  3. Step 3: Cross multiply
    14,993.79x = 20,691.29 × 8,279.28
  4. Step 4: Simplify right side
    14,993.79x = 171,308,942.07
  5. Step 5: Solve for x
    x = 171,308,942.07/14,993.79
  6. Step 6: Final answer
    x = 11,425.33

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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.