Home / 20,884.15-31,341.79-8,404.28

Finding the Fourth Proportional to 20,884.15, 31,341.79 and 8,404.28

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Solution

The fourth proportional to 20,884.15, 31,341.79 and 8,404.28 is: 12,612.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.15 : 31,341.79 = 8,404.28 : x
  2. Step 2: Convert to fraction form
    20,884.15/31,341.79 = 8,404.28/x
  3. Step 3: Cross multiply
    20,884.15x = 31,341.79 × 8,404.28
  4. Step 4: Simplify right side
    20,884.15x = 263,405,001.14
  5. Step 5: Solve for x
    x = 263,405,001.14/20,884.15
  6. Step 6: Final answer
    x = 12,612.68

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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.