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Finding the Fourth Proportional to 19,996.70, 29,998.65 and 8,311.10

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Solution

The fourth proportional to 19,996.70, 29,998.65 and 8,311.10 is: 12,468.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,996.70 : 29,998.65 = 8,311.10 : x
  2. Step 2: Convert to fraction form
    19,996.70/29,998.65 = 8,311.10/x
  3. Step 3: Cross multiply
    19,996.70x = 29,998.65 × 8,311.10
  4. Step 4: Simplify right side
    19,996.70x = 249,321,780.02
  5. Step 5: Solve for x
    x = 249,321,780.02/19,996.70
  6. Step 6: Final answer
    x = 12,468.15

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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.