Home / 10,120.21-15,181.13-3,100.78

Finding the Fourth Proportional to 10,120.21, 15,181.13 and 3,100.78

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Solution

The fourth proportional to 10,120.21, 15,181.13 and 3,100.78 is: 4,651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.21 : 15,181.13 = 3,100.78 : x
  2. Step 2: Convert to fraction form
    10,120.21/15,181.13 = 3,100.78/x
  3. Step 3: Cross multiply
    10,120.21x = 15,181.13 × 3,100.78
  4. Step 4: Simplify right side
    10,120.21x = 47,073,344.28
  5. Step 5: Solve for x
    x = 47,073,344.28/10,120.21
  6. Step 6: Final answer
    x = 4,651.42

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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.