Home / 20,945.20-31,421.58-6,906.04

Finding the Fourth Proportional to 20,945.20, 31,421.58 and 6,906.04

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Solution

The fourth proportional to 20,945.20, 31,421.58 and 6,906.04 is: 10,360.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.20 : 31,421.58 = 6,906.04 : x
  2. Step 2: Convert to fraction form
    20,945.20/31,421.58 = 6,906.04/x
  3. Step 3: Cross multiply
    20,945.20x = 31,421.58 × 6,906.04
  4. Step 4: Simplify right side
    20,945.20x = 216,998,688.34
  5. Step 5: Solve for x
    x = 216,998,688.34/20,945.20
  6. Step 6: Final answer
    x = 10,360.31

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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.