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Finding the Fourth Proportional to 39,805.36, 54,932.72 and 21,901.68

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Solution

The fourth proportional to 39,805.36, 54,932.72 and 21,901.68 is: 30,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,805.36 : 54,932.72 = 21,901.68 : x
  2. Step 2: Convert to fraction form
    39,805.36/54,932.72 = 21,901.68/x
  3. Step 3: Cross multiply
    39,805.36x = 54,932.72 × 21,901.68
  4. Step 4: Simplify right side
    39,805.36x = 1,203,118,854.97
  5. Step 5: Solve for x
    x = 1,203,118,854.97/39,805.36
  6. Step 6: Final answer
    x = 30,225.05

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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.