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Finding the Fourth Proportional to 8,580.64, 12,872.88 and 3,391.84

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Solution

The fourth proportional to 8,580.64, 12,872.88 and 3,391.84 is: 5,088.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.64 : 12,872.88 = 3,391.84 : x
  2. Step 2: Convert to fraction form
    8,580.64/12,872.88 = 3,391.84/x
  3. Step 3: Cross multiply
    8,580.64x = 12,872.88 × 3,391.84
  4. Step 4: Simplify right side
    8,580.64x = 43,662,749.30
  5. Step 5: Solve for x
    x = 43,662,749.30/8,580.64
  6. Step 6: Final answer
    x = 5,088.52

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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.