Home / 39,860.78-55,007.94-21,955.84

Finding the Fourth Proportional to 39,860.78, 55,007.94 and 21,955.84

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Solution

The fourth proportional to 39,860.78, 55,007.94 and 21,955.84 is: 30,299.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860.78 : 55,007.94 = 21,955.84 : x
  2. Step 2: Convert to fraction form
    39,860.78/55,007.94 = 21,955.84/x
  3. Step 3: Cross multiply
    39,860.78x = 55,007.94 × 21,955.84
  4. Step 4: Simplify right side
    39,860.78x = 1,207,745,254.33
  5. Step 5: Solve for x
    x = 1,207,745,254.33/39,860.78
  6. Step 6: Final answer
    x = 30,299.09

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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.