Home / 40,112.75-55,355.39-21,715.80

Finding the Fourth Proportional to 40,112.75, 55,355.39 and 21,715.80

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Solution

The fourth proportional to 40,112.75, 55,355.39 and 21,715.80 is: 29,967.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,112.75 : 55,355.39 = 21,715.80 : x
  2. Step 2: Convert to fraction form
    40,112.75/55,355.39 = 21,715.80/x
  3. Step 3: Cross multiply
    40,112.75x = 55,355.39 × 21,715.80
  4. Step 4: Simplify right side
    40,112.75x = 1,202,086,578.16
  5. Step 5: Solve for x
    x = 1,202,086,578.16/40,112.75
  6. Step 6: Final answer
    x = 29,967.69

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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.