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Finding the Fourth Proportional to 8,916.32, 13,394.99 and 6,289.87

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Solution

The fourth proportional to 8,916.32, 13,394.99 and 6,289.87 is: 9,449.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.32 : 13,394.99 = 6,289.87 : x
  2. Step 2: Convert to fraction form
    8,916.32/13,394.99 = 6,289.87/x
  3. Step 3: Cross multiply
    8,916.32x = 13,394.99 × 6,289.87
  4. Step 4: Simplify right side
    8,916.32x = 84,252,714.30
  5. Step 5: Solve for x
    x = 84,252,714.30/8,916.32
  6. Step 6: Final answer
    x = 9,449.27

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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.