Home / 20,673.86-31,010.79-5,091.48

Finding the Fourth Proportional to 20,673.86, 31,010.79 and 5,091.48

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Solution

The fourth proportional to 20,673.86, 31,010.79 and 5,091.48 is: 7,637.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.86 : 31,010.79 = 5,091.48 : x
  2. Step 2: Convert to fraction form
    20,673.86/31,010.79 = 5,091.48/x
  3. Step 3: Cross multiply
    20,673.86x = 31,010.79 × 5,091.48
  4. Step 4: Simplify right side
    20,673.86x = 157,890,817.07
  5. Step 5: Solve for x
    x = 157,890,817.07/20,673.86
  6. Step 6: Final answer
    x = 7,637.22

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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.