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Finding the Fourth Proportional to 8,280.64, 12,412.16 and 4,168

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Solution

The fourth proportional to 8,280.64, 12,412.16 and 4,168 is: 6,247.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.64 : 12,412.16 = 4,168 : x
  2. Step 2: Convert to fraction form
    8,280.64/12,412.16 = 4,168/x
  3. Step 3: Cross multiply
    8,280.64x = 12,412.16 × 4,168
  4. Step 4: Simplify right side
    8,280.64x = 51,733,882.88
  5. Step 5: Solve for x
    x = 51,733,882.88/8,280.64
  6. Step 6: Final answer
    x = 6,247.57

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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.