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Finding the Fourth Proportional to 38,956.80, 53,747.49 and 21,958.95

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Solution

The fourth proportional to 38,956.80, 53,747.49 and 21,958.95 is: 30,296.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,956.80 : 53,747.49 = 21,958.95 : x
  2. Step 2: Convert to fraction form
    38,956.80/53,747.49 = 21,958.95/x
  3. Step 3: Cross multiply
    38,956.80x = 53,747.49 × 21,958.95
  4. Step 4: Simplify right side
    38,956.80x = 1,180,238,445.54
  5. Step 5: Solve for x
    x = 1,180,238,445.54/38,956.80
  6. Step 6: Final answer
    x = 30,296.08

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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.