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Finding the Fourth Proportional to 20,673.97, 31,010.97 and 8,980.81

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Solution

The fourth proportional to 20,673.97, 31,010.97 and 8,980.81 is: 13,471.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.97 : 31,010.97 = 8,980.81 : x
  2. Step 2: Convert to fraction form
    20,673.97/31,010.97 = 8,980.81/x
  3. Step 3: Cross multiply
    20,673.97x = 31,010.97 × 8,980.81
  4. Step 4: Simplify right side
    20,673.97x = 278,503,629.49
  5. Step 5: Solve for x
    x = 278,503,629.49/20,673.97
  6. Step 6: Final answer
    x = 13,471.22

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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.