Home / 20,311.21-30,331.85-20,091.29

Finding the Fourth Proportional to 20,311.21, 30,331.85 and 20,091.29

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Solution

The fourth proportional to 20,311.21, 30,331.85 and 20,091.29 is: 30,003.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.21 : 30,331.85 = 20,091.29 : x
  2. Step 2: Convert to fraction form
    20,311.21/30,331.85 = 20,091.29/x
  3. Step 3: Cross multiply
    20,311.21x = 30,331.85 × 20,091.29
  4. Step 4: Simplify right side
    20,311.21x = 609,406,167.92
  5. Step 5: Solve for x
    x = 609,406,167.92/20,311.21
  6. Step 6: Final answer
    x = 30,003.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.