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Finding the Fourth Proportional to 38,755.57, 53,480.95 and 21,759.50

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Solution

The fourth proportional to 38,755.57, 53,480.95 and 21,759.50 is: 30,027.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,755.57 : 53,480.95 = 21,759.50 : x
  2. Step 2: Convert to fraction form
    38,755.57/53,480.95 = 21,759.50/x
  3. Step 3: Cross multiply
    38,755.57x = 53,480.95 × 21,759.50
  4. Step 4: Simplify right side
    38,755.57x = 1,163,718,622.73
  5. Step 5: Solve for x
    x = 1,163,718,622.73/38,755.57
  6. Step 6: Final answer
    x = 30,027.14

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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.