Home / 20,618.21-30,879.18-15,057.78

Finding the Fourth Proportional to 20,618.21, 30,879.18 and 15,057.78

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Solution

The fourth proportional to 20,618.21, 30,879.18 and 15,057.78 is: 22,551.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.21 : 30,879.18 = 15,057.78 : x
  2. Step 2: Convert to fraction form
    20,618.21/30,879.18 = 15,057.78/x
  3. Step 3: Cross multiply
    20,618.21x = 30,879.18 × 15,057.78
  4. Step 4: Simplify right side
    20,618.21x = 464,971,899.02
  5. Step 5: Solve for x
    x = 464,971,899.02/20,618.21
  6. Step 6: Final answer
    x = 22,551.52

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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.