Home / 38,721.60-58,072.32-12,412.80

Finding the Fourth Proportional to 38,721.60, 58,072.32 and 12,412.80

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Solution

The fourth proportional to 38,721.60, 58,072.32 and 12,412.80 is: 18,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,721.60 : 58,072.32 = 12,412.80 : x
  2. Step 2: Convert to fraction form
    38,721.60/58,072.32 = 12,412.80/x
  3. Step 3: Cross multiply
    38,721.60x = 58,072.32 × 12,412.80
  4. Step 4: Simplify right side
    38,721.60x = 720,840,093.70
  5. Step 5: Solve for x
    x = 720,840,093.70/38,721.60
  6. Step 6: Final answer
    x = 18,615.97

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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.