Home / 39,820.36-54,951.60-21,916.12

Finding the Fourth Proportional to 39,820.36, 54,951.60 and 21,916.12

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Solution

The fourth proportional to 39,820.36, 54,951.60 and 21,916.12 is: 30,243.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,820.36 : 54,951.60 = 21,916.12 : x
  2. Step 2: Convert to fraction form
    39,820.36/54,951.60 = 21,916.12/x
  3. Step 3: Cross multiply
    39,820.36x = 54,951.60 × 21,916.12
  4. Step 4: Simplify right side
    39,820.36x = 1,204,325,859.79
  5. Step 5: Solve for x
    x = 1,204,325,859.79/39,820.36
  6. Step 6: Final answer
    x = 30,243.97

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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.