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Finding the Fourth Proportional to 12,539.76, 18,814.43 and 5,879.89

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Solution

The fourth proportional to 12,539.76, 18,814.43 and 5,879.89 is: 8,822.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.76 : 18,814.43 = 5,879.89 : x
  2. Step 2: Convert to fraction form
    12,539.76/18,814.43 = 5,879.89/x
  3. Step 3: Cross multiply
    12,539.76x = 18,814.43 × 5,879.89
  4. Step 4: Simplify right side
    12,539.76x = 110,626,783.96
  5. Step 5: Solve for x
    x = 110,626,783.96/12,539.76
  6. Step 6: Final answer
    x = 8,822.08

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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.