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Finding the Fourth Proportional to 39,287.72, 58,893.08 and 12,974.88

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Solution

The fourth proportional to 39,287.72, 58,893.08 and 12,974.88 is: 19,449.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,287.72 : 58,893.08 = 12,974.88 : x
  2. Step 2: Convert to fraction form
    39,287.72/58,893.08 = 12,974.88/x
  3. Step 3: Cross multiply
    39,287.72x = 58,893.08 × 12,974.88
  4. Step 4: Simplify right side
    39,287.72x = 764,130,645.83
  5. Step 5: Solve for x
    x = 764,130,645.83/39,287.72
  6. Step 6: Final answer
    x = 19,449.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.