Home / 20,887.99-31,324.69-8,404.78

Finding the Fourth Proportional to 20,887.99, 31,324.69 and 8,404.78

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Solution

The fourth proportional to 20,887.99, 31,324.69 and 8,404.78 is: 12,604.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.99 : 31,324.69 = 8,404.78 : x
  2. Step 2: Convert to fraction form
    20,887.99/31,324.69 = 8,404.78/x
  3. Step 3: Cross multiply
    20,887.99x = 31,324.69 × 8,404.78
  4. Step 4: Simplify right side
    20,887.99x = 263,276,971.39
  5. Step 5: Solve for x
    x = 263,276,971.39/20,887.99
  6. Step 6: Final answer
    x = 12,604.23

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1.5x scale

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.