Home / 20,853.59-28,803.20-15,179.33

Finding the Fourth Proportional to 20,853.59, 28,803.20 and 15,179.33

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Solution

The fourth proportional to 20,853.59, 28,803.20 and 15,179.33 is: 20,965.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.59 : 28,803.20 = 15,179.33 : x
  2. Step 2: Convert to fraction form
    20,853.59/28,803.20 = 15,179.33/x
  3. Step 3: Cross multiply
    20,853.59x = 28,803.20 × 15,179.33
  4. Step 4: Simplify right side
    20,853.59x = 437,213,273.97
  5. Step 5: Solve for x
    x = 437,213,273.97/20,853.59
  6. Step 6: Final answer
    x = 20,965.86

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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.