Home / 20,984.87-28,959.11-11,553.44

Finding the Fourth Proportional to 20,984.87, 28,959.11 and 11,553.44

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Solution

The fourth proportional to 20,984.87, 28,959.11 and 11,553.44 is: 15,943.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.87 : 28,959.11 = 11,553.44 : x
  2. Step 2: Convert to fraction form
    20,984.87/28,959.11 = 11,553.44/x
  3. Step 3: Cross multiply
    20,984.87x = 28,959.11 × 11,553.44
  4. Step 4: Simplify right side
    20,984.87x = 334,577,164.35
  5. Step 5: Solve for x
    x = 334,577,164.35/20,984.87
  6. Step 6: Final answer
    x = 15,943.73

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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.