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Finding the Fourth Proportional to 19,919.80, 29,843.70 and 9,508.60

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Solution

The fourth proportional to 19,919.80, 29,843.70 and 9,508.60 is: 14,245.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.80 : 29,843.70 = 9,508.60 : x
  2. Step 2: Convert to fraction form
    19,919.80/29,843.70 = 9,508.60/x
  3. Step 3: Cross multiply
    19,919.80x = 29,843.70 × 9,508.60
  4. Step 4: Simplify right side
    19,919.80x = 283,771,805.82
  5. Step 5: Solve for x
    x = 283,771,805.82/19,919.80
  6. Step 6: Final answer
    x = 14,245.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.