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Finding the Fourth Proportional to 6,391.60, 8,819.78 and 4,713.91

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Solution

The fourth proportional to 6,391.60, 8,819.78 and 4,713.91 is: 6,504.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.60 : 8,819.78 = 4,713.91 : x
  2. Step 2: Convert to fraction form
    6,391.60/8,819.78 = 4,713.91/x
  3. Step 3: Cross multiply
    6,391.60x = 8,819.78 × 4,713.91
  4. Step 4: Simplify right side
    6,391.60x = 41,575,603.52
  5. Step 5: Solve for x
    x = 41,575,603.52/6,391.60
  6. Step 6: Final answer
    x = 6,504.73

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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.