Home / 20,857.23-31,277.48-12,098.30

Finding the Fourth Proportional to 20,857.23, 31,277.48 and 12,098.30

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Solution

The fourth proportional to 20,857.23, 31,277.48 and 12,098.30 is: 18,142.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.23 : 31,277.48 = 12,098.30 : x
  2. Step 2: Convert to fraction form
    20,857.23/31,277.48 = 12,098.30/x
  3. Step 3: Cross multiply
    20,857.23x = 31,277.48 × 12,098.30
  4. Step 4: Simplify right side
    20,857.23x = 378,404,119.41
  5. Step 5: Solve for x
    x = 378,404,119.41/20,857.23
  6. Step 6: Final answer
    x = 18,142.59

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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.