Home / 39,816.72-54,947.88-21,913.20

Finding the Fourth Proportional to 39,816.72, 54,947.88 and 21,913.20

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Solution

The fourth proportional to 39,816.72, 54,947.88 and 21,913.20 is: 30,240.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,816.72 : 54,947.88 = 21,913.20 : x
  2. Step 2: Convert to fraction form
    39,816.72/54,947.88 = 21,913.20/x
  3. Step 3: Cross multiply
    39,816.72x = 54,947.88 × 21,913.20
  4. Step 4: Simplify right side
    39,816.72x = 1,204,083,884.02
  5. Step 5: Solve for x
    x = 1,204,083,884.02/39,816.72
  6. Step 6: Final answer
    x = 30,240.66

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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.