Home / 20,949.48-31,420.98-6,909.75

Finding the Fourth Proportional to 20,949.48, 31,420.98 and 6,909.75

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Solution

The fourth proportional to 20,949.48, 31,420.98 and 6,909.75 is: 10,363.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.48 : 31,420.98 = 6,909.75 : x
  2. Step 2: Convert to fraction form
    20,949.48/31,420.98 = 6,909.75/x
  3. Step 3: Cross multiply
    20,949.48x = 31,420.98 × 6,909.75
  4. Step 4: Simplify right side
    20,949.48x = 217,111,116.56
  5. Step 5: Solve for x
    x = 217,111,116.56/20,949.48
  6. Step 6: Final answer
    x = 10,363.56

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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.