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Finding the Fourth Proportional to 8,738.86, 13,083.87 and 4,721.86

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Solution

The fourth proportional to 8,738.86, 13,083.87 and 4,721.86 is: 7,069.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,738.86 : 13,083.87 = 4,721.86 : x
  2. Step 2: Convert to fraction form
    8,738.86/13,083.87 = 4,721.86/x
  3. Step 3: Cross multiply
    8,738.86x = 13,083.87 × 4,721.86
  4. Step 4: Simplify right side
    8,738.86x = 61,780,191.95
  5. Step 5: Solve for x
    x = 61,780,191.95/8,738.86
  6. Step 6: Final answer
    x = 7,069.59

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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.