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Finding the Fourth Proportional to 21,979.97, 32,969.49 and 5,340.08

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Solution

The fourth proportional to 21,979.97, 32,969.49 and 5,340.08 is: 8,010.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.97 : 32,969.49 = 5,340.08 : x
  2. Step 2: Convert to fraction form
    21,979.97/32,969.49 = 5,340.08/x
  3. Step 3: Cross multiply
    21,979.97x = 32,969.49 × 5,340.08
  4. Step 4: Simplify right side
    21,979.97x = 176,059,714.16
  5. Step 5: Solve for x
    x = 176,059,714.16/21,979.97
  6. Step 6: Final answer
    x = 8,010.01

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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.