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Finding the Fourth Proportional to 21,939.48, 32,891.88 and 7,897.08

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Solution

The fourth proportional to 21,939.48, 32,891.88 and 7,897.08 is: 11,839.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.48 : 32,891.88 = 7,897.08 : x
  2. Step 2: Convert to fraction form
    21,939.48/32,891.88 = 7,897.08/x
  3. Step 3: Cross multiply
    21,939.48x = 32,891.88 × 7,897.08
  4. Step 4: Simplify right side
    21,939.48x = 259,749,807.71
  5. Step 5: Solve for x
    x = 259,749,807.71/21,939.48
  6. Step 6: Final answer
    x = 11,839.38

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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.