Home / 39,286.68-54,213.96-21,381.72

Finding the Fourth Proportional to 39,286.68, 54,213.96 and 21,381.72

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Solution

The fourth proportional to 39,286.68, 54,213.96 and 21,381.72 is: 29,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.68 : 54,213.96 = 21,381.72 : x
  2. Step 2: Convert to fraction form
    39,286.68/54,213.96 = 21,381.72/x
  3. Step 3: Cross multiply
    39,286.68x = 54,213.96 × 21,381.72
  4. Step 4: Simplify right side
    39,286.68x = 1,159,187,712.81
  5. Step 5: Solve for x
    x = 1,159,187,712.81/39,286.68
  6. Step 6: Final answer
    x = 29,505.87

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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.