Home / 20,865.52-31,297.47-8,381.80

Finding the Fourth Proportional to 20,865.52, 31,297.47 and 8,381.80

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Solution

The fourth proportional to 20,865.52, 31,297.47 and 8,381.80 is: 12,572.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.52 : 31,297.47 = 8,381.80 : x
  2. Step 2: Convert to fraction form
    20,865.52/31,297.47 = 8,381.80/x
  3. Step 3: Cross multiply
    20,865.52x = 31,297.47 × 8,381.80
  4. Step 4: Simplify right side
    20,865.52x = 262,329,134.05
  5. Step 5: Solve for x
    x = 262,329,134.05/20,865.52
  6. Step 6: Final answer
    x = 12,572.37

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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.