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Finding the Fourth Proportional to 38,640.88, 57,956.48 and 12,343.44

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Solution

The fourth proportional to 38,640.88, 57,956.48 and 12,343.44 is: 18,513.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.88 : 57,956.48 = 12,343.44 : x
  2. Step 2: Convert to fraction form
    38,640.88/57,956.48 = 12,343.44/x
  3. Step 3: Cross multiply
    38,640.88x = 57,956.48 × 12,343.44
  4. Step 4: Simplify right side
    38,640.88x = 715,382,333.49
  5. Step 5: Solve for x
    x = 715,382,333.49/38,640.88
  6. Step 6: Final answer
    x = 18,513.61

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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.