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Finding the Fourth Proportional to 39,758.60, 54,865.94 and 21,608.90

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Solution

The fourth proportional to 39,758.60, 54,865.94 and 21,608.90 is: 29,819.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,758.60 : 54,865.94 = 21,608.90 : x
  2. Step 2: Convert to fraction form
    39,758.60/54,865.94 = 21,608.90/x
  3. Step 3: Cross multiply
    39,758.60x = 54,865.94 × 21,608.90
  4. Step 4: Simplify right side
    39,758.60x = 1,185,592,390.56
  5. Step 5: Solve for x
    x = 1,185,592,390.56/39,758.60
  6. Step 6: Final answer
    x = 29,819.77

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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.