Home / 39,821.36-54,952.98-21,917.12

Finding the Fourth Proportional to 39,821.36, 54,952.98 and 21,917.12

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Solution

The fourth proportional to 39,821.36, 54,952.98 and 21,917.12 is: 30,245.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,821.36 : 54,952.98 = 21,917.12 : x
  2. Step 2: Convert to fraction form
    39,821.36/54,952.98 = 21,917.12/x
  3. Step 3: Cross multiply
    39,821.36x = 54,952.98 × 21,917.12
  4. Step 4: Simplify right side
    39,821.36x = 1,204,411,057.02
  5. Step 5: Solve for x
    x = 1,204,411,057.02/39,821.36
  6. Step 6: Final answer
    x = 30,245.35

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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.