Home / 28,918.71-39,912.09-18,309.33

Finding the Fourth Proportional to 28,918.71, 39,912.09 and 18,309.33

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Solution

The fourth proportional to 28,918.71, 39,912.09 and 18,309.33 is: 25,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.71 : 39,912.09 = 18,309.33 : x
  2. Step 2: Convert to fraction form
    28,918.71/39,912.09 = 18,309.33/x
  3. Step 3: Cross multiply
    28,918.71x = 39,912.09 × 18,309.33
  4. Step 4: Simplify right side
    28,918.71x = 730,763,626.80
  5. Step 5: Solve for x
    x = 730,763,626.80/28,918.71
  6. Step 6: Final answer
    x = 25,269.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.