Home / 20,883.90-31,341.42-8,404.03

Finding the Fourth Proportional to 20,883.90, 31,341.42 and 8,404.03

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Solution

The fourth proportional to 20,883.90, 31,341.42 and 8,404.03 is: 12,612.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.90 : 31,341.42 = 8,404.03 : x
  2. Step 2: Convert to fraction form
    20,883.90/31,341.42 = 8,404.03/x
  3. Step 3: Cross multiply
    20,883.90x = 31,341.42 × 8,404.03
  4. Step 4: Simplify right side
    20,883.90x = 263,394,191.90
  5. Step 5: Solve for x
    x = 263,394,191.90/20,883.90
  6. Step 6: Final answer
    x = 12,612.31

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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.