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Finding the Fourth Proportional to 8,239.59, 12,361.21 and 4,539.91

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Solution

The fourth proportional to 8,239.59, 12,361.21 and 4,539.91 is: 6,810.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.59 : 12,361.21 = 4,539.91 : x
  2. Step 2: Convert to fraction form
    8,239.59/12,361.21 = 4,539.91/x
  3. Step 3: Cross multiply
    8,239.59x = 12,361.21 × 4,539.91
  4. Step 4: Simplify right side
    8,239.59x = 56,118,807.93
  5. Step 5: Solve for x
    x = 56,118,807.93/8,239.59
  6. Step 6: Final answer
    x = 6,810.88

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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.