Home / 20,977.29-31,467.56-8,491.41

Finding the Fourth Proportional to 20,977.29, 31,467.56 and 8,491.41

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Solution

The fourth proportional to 20,977.29, 31,467.56 and 8,491.41 is: 12,737.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.29 : 31,467.56 = 8,491.41 : x
  2. Step 2: Convert to fraction form
    20,977.29/31,467.56 = 8,491.41/x
  3. Step 3: Cross multiply
    20,977.29x = 31,467.56 × 8,491.41
  4. Step 4: Simplify right side
    20,977.29x = 267,203,911.20
  5. Step 5: Solve for x
    x = 267,203,911.20/20,977.29
  6. Step 6: Final answer
    x = 12,737.77

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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.