Home / 20,715.43-31,056.26-9,629.09

Finding the Fourth Proportional to 20,715.43, 31,056.26 and 9,629.09

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Solution

The fourth proportional to 20,715.43, 31,056.26 and 9,629.09 is: 14,435.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.43 : 31,056.26 = 9,629.09 : x
  2. Step 2: Convert to fraction form
    20,715.43/31,056.26 = 9,629.09/x
  3. Step 3: Cross multiply
    20,715.43x = 31,056.26 × 9,629.09
  4. Step 4: Simplify right side
    20,715.43x = 299,043,624.32
  5. Step 5: Solve for x
    x = 299,043,624.32/20,715.43
  6. Step 6: Final answer
    x = 14,435.79

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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.