Home / 20,135.88-30,185.55-8,442.72

Finding the Fourth Proportional to 20,135.88, 30,185.55 and 8,442.72

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Solution

The fourth proportional to 20,135.88, 30,185.55 and 8,442.72 is: 12,656.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.88 : 30,185.55 = 8,442.72 : x
  2. Step 2: Convert to fraction form
    20,135.88/30,185.55 = 8,442.72/x
  3. Step 3: Cross multiply
    20,135.88x = 30,185.55 × 8,442.72
  4. Step 4: Simplify right side
    20,135.88x = 254,848,146.70
  5. Step 5: Solve for x
    x = 254,848,146.70/20,135.88
  6. Step 6: Final answer
    x = 12,656.42

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1.5x scale

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.