Home / 20,893.05-31,339.24-8,412.77

Finding the Fourth Proportional to 20,893.05, 31,339.24 and 8,412.77

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Solution

The fourth proportional to 20,893.05, 31,339.24 and 8,412.77 is: 12,619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.05 : 31,339.24 = 8,412.77 : x
  2. Step 2: Convert to fraction form
    20,893.05/31,339.24 = 8,412.77/x
  3. Step 3: Cross multiply
    20,893.05x = 31,339.24 × 8,412.77
  4. Step 4: Simplify right side
    20,893.05x = 263,649,941.66
  5. Step 5: Solve for x
    x = 263,649,941.66/20,893.05
  6. Step 6: Final answer
    x = 12,619.03

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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.