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Finding the Fourth Proportional to 8,289.08, 12,439.08 and 3,907.78

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Solution

The fourth proportional to 8,289.08, 12,439.08 and 3,907.78 is: 5,864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,289.08 : 12,439.08 = 3,907.78 : x
  2. Step 2: Convert to fraction form
    8,289.08/12,439.08 = 3,907.78/x
  3. Step 3: Cross multiply
    8,289.08x = 12,439.08 × 3,907.78
  4. Step 4: Simplify right side
    8,289.08x = 48,609,188.04
  5. Step 5: Solve for x
    x = 48,609,188.04/8,289.08
  6. Step 6: Final answer
    x = 5,864.24

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1.5x scale

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.