Home / 20,961.48-31,435.53-6,918.90

Finding the Fourth Proportional to 20,961.48, 31,435.53 and 6,918.90

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Solution

The fourth proportional to 20,961.48, 31,435.53 and 6,918.90 is: 10,376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.48 : 31,435.53 = 6,918.90 : x
  2. Step 2: Convert to fraction form
    20,961.48/31,435.53 = 6,918.90/x
  3. Step 3: Cross multiply
    20,961.48x = 31,435.53 × 6,918.90
  4. Step 4: Simplify right side
    20,961.48x = 217,499,288.52
  5. Step 5: Solve for x
    x = 217,499,288.52/20,961.48
  6. Step 6: Final answer
    x = 10,376.14

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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.