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Finding the Fourth Proportional to 19,998.20, 29,973.30 and 8,305.40

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Solution

The fourth proportional to 19,998.20, 29,973.30 and 8,305.40 is: 12,448.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.20 : 29,973.30 = 8,305.40 : x
  2. Step 2: Convert to fraction form
    19,998.20/29,973.30 = 8,305.40/x
  3. Step 3: Cross multiply
    19,998.20x = 29,973.30 × 8,305.40
  4. Step 4: Simplify right side
    19,998.20x = 248,940,245.82
  5. Step 5: Solve for x
    x = 248,940,245.82/19,998.20
  6. Step 6: Final answer
    x = 12,448.13

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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.