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Finding the Fourth Proportional to 19,809.80, 29,713.24 and 7,324.02

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Solution

The fourth proportional to 19,809.80, 29,713.24 and 7,324.02 is: 10,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,809.80 : 29,713.24 = 7,324.02 : x
  2. Step 2: Convert to fraction form
    19,809.80/29,713.24 = 7,324.02/x
  3. Step 3: Cross multiply
    19,809.80x = 29,713.24 × 7,324.02
  4. Step 4: Simplify right side
    19,809.80x = 217,620,364.02
  5. Step 5: Solve for x
    x = 217,620,364.02/19,809.80
  6. Step 6: Final answer
    x = 10,985.49

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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.