Home / 20,805.89-28,717.49-12,843.56

Finding the Fourth Proportional to 20,805.89, 28,717.49 and 12,843.56

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Solution

The fourth proportional to 20,805.89, 28,717.49 and 12,843.56 is: 17,727.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.89 : 28,717.49 = 12,843.56 : x
  2. Step 2: Convert to fraction form
    20,805.89/28,717.49 = 12,843.56/x
  3. Step 3: Cross multiply
    20,805.89x = 28,717.49 × 12,843.56
  4. Step 4: Simplify right side
    20,805.89x = 368,834,598.06
  5. Step 5: Solve for x
    x = 368,834,598.06/20,805.89
  6. Step 6: Final answer
    x = 17,727.41

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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.