Home / 20,808.24-31,212.21-8,331.15

Finding the Fourth Proportional to 20,808.24, 31,212.21 and 8,331.15

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Solution

The fourth proportional to 20,808.24, 31,212.21 and 8,331.15 is: 12,496.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.24 : 31,212.21 = 8,331.15 : x
  2. Step 2: Convert to fraction form
    20,808.24/31,212.21 = 8,331.15/x
  3. Step 3: Cross multiply
    20,808.24x = 31,212.21 × 8,331.15
  4. Step 4: Simplify right side
    20,808.24x = 260,033,447.28
  5. Step 5: Solve for x
    x = 260,033,447.28/20,808.24
  6. Step 6: Final answer
    x = 12,496.66

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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.