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Finding the Fourth Proportional to 19,810.43, 29,720.13 and 6,662.44

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Solution

The fourth proportional to 19,810.43, 29,720.13 and 6,662.44 is: 9,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.43 : 29,720.13 = 6,662.44 : x
  2. Step 2: Convert to fraction form
    19,810.43/29,720.13 = 6,662.44/x
  3. Step 3: Cross multiply
    19,810.43x = 29,720.13 × 6,662.44
  4. Step 4: Simplify right side
    19,810.43x = 198,008,582.92
  5. Step 5: Solve for x
    x = 198,008,582.92/19,810.43
  6. Step 6: Final answer
    x = 9,995.17

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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.