Home / 20,670.28-31,027.26-12,884.44

Finding the Fourth Proportional to 20,670.28, 31,027.26 and 12,884.44

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Solution

The fourth proportional to 20,670.28, 31,027.26 and 12,884.44 is: 19,340.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.28 : 31,027.26 = 12,884.44 : x
  2. Step 2: Convert to fraction form
    20,670.28/31,027.26 = 12,884.44/x
  3. Step 3: Cross multiply
    20,670.28x = 31,027.26 × 12,884.44
  4. Step 4: Simplify right side
    20,670.28x = 399,768,869.83
  5. Step 5: Solve for x
    x = 399,768,869.83/20,670.28
  6. Step 6: Final answer
    x = 19,340.27

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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.