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Finding the Fourth Proportional to 39,716.48, 54,808.48 and 21,811.68

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Solution

The fourth proportional to 39,716.48, 54,808.48 and 21,811.68 is: 30,099.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,716.48 : 54,808.48 = 21,811.68 : x
  2. Step 2: Convert to fraction form
    39,716.48/54,808.48 = 21,811.68/x
  3. Step 3: Cross multiply
    39,716.48x = 54,808.48 × 21,811.68
  4. Step 4: Simplify right side
    39,716.48x = 1,195,465,027.05
  5. Step 5: Solve for x
    x = 1,195,465,027.05/39,716.48
  6. Step 6: Final answer
    x = 30,099.97

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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.