Home / 20,785.24-31,136.70-9,676.60

Finding the Fourth Proportional to 20,785.24, 31,136.70 and 9,676.60

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Solution

The fourth proportional to 20,785.24, 31,136.70 and 9,676.60 is: 14,495.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.24 : 31,136.70 = 9,676.60 : x
  2. Step 2: Convert to fraction form
    20,785.24/31,136.70 = 9,676.60/x
  3. Step 3: Cross multiply
    20,785.24x = 31,136.70 × 9,676.60
  4. Step 4: Simplify right side
    20,785.24x = 301,297,391.22
  5. Step 5: Solve for x
    x = 301,297,391.22/20,785.24
  6. Step 6: Final answer
    x = 14,495.74

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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.