Home / 19,939.36-29,920.80-7,287.98

Finding the Fourth Proportional to 19,939.36, 29,920.80 and 7,287.98

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Solution

The fourth proportional to 19,939.36, 29,920.80 and 7,287.98 is: 10,936.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.36 : 29,920.80 = 7,287.98 : x
  2. Step 2: Convert to fraction form
    19,939.36/29,920.80 = 7,287.98/x
  3. Step 3: Cross multiply
    19,939.36x = 29,920.80 × 7,287.98
  4. Step 4: Simplify right side
    19,939.36x = 218,062,191.98
  5. Step 5: Solve for x
    x = 218,062,191.98/19,939.36
  6. Step 6: Final answer
    x = 10,936.27

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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.