Home / 39,828.78-54,964.08-21,923.28

Finding the Fourth Proportional to 39,828.78, 54,964.08 and 21,923.28

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Solution

The fourth proportional to 39,828.78, 54,964.08 and 21,923.28 is: 30,254.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,828.78 : 54,964.08 = 21,923.28 : x
  2. Step 2: Convert to fraction form
    39,828.78/54,964.08 = 21,923.28/x
  3. Step 3: Cross multiply
    39,828.78x = 54,964.08 × 21,923.28
  4. Step 4: Simplify right side
    39,828.78x = 1,204,992,915.78
  5. Step 5: Solve for x
    x = 1,204,992,915.78/39,828.78
  6. Step 6: Final answer
    x = 30,254.33

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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.