Home / 20,709.28-31,039.26-11,926

Finding the Fourth Proportional to 20,709.28, 31,039.26 and 11,926

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Solution

The fourth proportional to 20,709.28, 31,039.26 and 11,926 is: 17,874.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.28 : 31,039.26 = 11,926 : x
  2. Step 2: Convert to fraction form
    20,709.28/31,039.26 = 11,926/x
  3. Step 3: Cross multiply
    20,709.28x = 31,039.26 × 11,926
  4. Step 4: Simplify right side
    20,709.28x = 370,174,214.76
  5. Step 5: Solve for x
    x = 370,174,214.76/20,709.28
  6. Step 6: Final answer
    x = 17,874.80

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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.