Home / 20,645.21-30,982.40-8,165.66

Finding the Fourth Proportional to 20,645.21, 30,982.40 and 8,165.66

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Solution

The fourth proportional to 20,645.21, 30,982.40 and 8,165.66 is: 12,254.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.21 : 30,982.40 = 8,165.66 : x
  2. Step 2: Convert to fraction form
    20,645.21/30,982.40 = 8,165.66/x
  3. Step 3: Cross multiply
    20,645.21x = 30,982.40 × 8,165.66
  4. Step 4: Simplify right side
    20,645.21x = 252,991,548.64
  5. Step 5: Solve for x
    x = 252,991,548.64/20,645.21
  6. Step 6: Final answer
    x = 12,254.25

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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.