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Finding the Fourth Proportional to 8,368.79, 12,539.82 and 4,419.87

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Solution

The fourth proportional to 8,368.79, 12,539.82 and 4,419.87 is: 6,622.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368.79 : 12,539.82 = 4,419.87 : x
  2. Step 2: Convert to fraction form
    8,368.79/12,539.82 = 4,419.87/x
  3. Step 3: Cross multiply
    8,368.79x = 12,539.82 × 4,419.87
  4. Step 4: Simplify right side
    8,368.79x = 55,424,374.22
  5. Step 5: Solve for x
    x = 55,424,374.22/8,368.79
  6. Step 6: Final answer
    x = 6,622.75

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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.