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Finding the Fourth Proportional to 30,620.61, 45,910.02 and 15,590.79

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Solution

The fourth proportional to 30,620.61, 45,910.02 and 15,590.79 is: 23,375.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.61 : 45,910.02 = 15,590.79 : x
  2. Step 2: Convert to fraction form
    30,620.61/45,910.02 = 15,590.79/x
  3. Step 3: Cross multiply
    30,620.61x = 45,910.02 × 15,590.79
  4. Step 4: Simplify right side
    30,620.61x = 715,773,480.72
  5. Step 5: Solve for x
    x = 715,773,480.72/30,620.61
  6. Step 6: Final answer
    x = 23,375.55

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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.