Home / 21,001.87-28,979.94-11,571.04

Finding the Fourth Proportional to 21,001.87, 28,979.94 and 11,571.04

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Solution

The fourth proportional to 21,001.87, 28,979.94 and 11,571.04 is: 15,966.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.87 : 28,979.94 = 11,571.04 : x
  2. Step 2: Convert to fraction form
    21,001.87/28,979.94 = 11,571.04/x
  3. Step 3: Cross multiply
    21,001.87x = 28,979.94 × 11,571.04
  4. Step 4: Simplify right side
    21,001.87x = 335,328,044.94
  5. Step 5: Solve for x
    x = 335,328,044.94/21,001.87
  6. Step 6: Final answer
    x = 15,966.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.