Home / 20,917.68-31,298.09-12,453.22

Finding the Fourth Proportional to 20,917.68, 31,298.09 and 12,453.22

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Solution

The fourth proportional to 20,917.68, 31,298.09 and 12,453.22 is: 18,633.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.68 : 31,298.09 = 12,453.22 : x
  2. Step 2: Convert to fraction form
    20,917.68/31,298.09 = 12,453.22/x
  3. Step 3: Cross multiply
    20,917.68x = 31,298.09 × 12,453.22
  4. Step 4: Simplify right side
    20,917.68x = 389,762,109.73
  5. Step 5: Solve for x
    x = 389,762,109.73/20,917.68
  6. Step 6: Final answer
    x = 18,633.14

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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.