Home / 20,618.72-30,907.32-8,147.60

Finding the Fourth Proportional to 20,618.72, 30,907.32 and 8,147.60

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Solution

The fourth proportional to 20,618.72, 30,907.32 and 8,147.60 is: 12,213.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.72 : 30,907.32 = 8,147.60 : x
  2. Step 2: Convert to fraction form
    20,618.72/30,907.32 = 8,147.60/x
  3. Step 3: Cross multiply
    20,618.72x = 30,907.32 × 8,147.60
  4. Step 4: Simplify right side
    20,618.72x = 251,820,325.90
  5. Step 5: Solve for x
    x = 251,820,325.90/20,618.72
  6. Step 6: Final answer
    x = 12,213.19

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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.