Home / 39,819.69-54,954.86-21,918.33

Finding the Fourth Proportional to 39,819.69, 54,954.86 and 21,918.33

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Solution

The fourth proportional to 39,819.69, 54,954.86 and 21,918.33 is: 30,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,819.69 : 54,954.86 = 21,918.33 : x
  2. Step 2: Convert to fraction form
    39,819.69/54,954.86 = 21,918.33/x
  3. Step 3: Cross multiply
    39,819.69x = 54,954.86 × 21,918.33
  4. Step 4: Simplify right side
    39,819.69x = 1,204,518,646.99
  5. Step 5: Solve for x
    x = 1,204,518,646.99/39,819.69
  6. Step 6: Final answer
    x = 30,249.32

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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.