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Finding the Fourth Proportional to 8,378.64, 11,560.32 and 4,841.64

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Solution

The fourth proportional to 8,378.64, 11,560.32 and 4,841.64 is: 6,680.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.64 : 11,560.32 = 4,841.64 : x
  2. Step 2: Convert to fraction form
    8,378.64/11,560.32 = 4,841.64/x
  3. Step 3: Cross multiply
    8,378.64x = 11,560.32 × 4,841.64
  4. Step 4: Simplify right side
    8,378.64x = 55,970,907.72
  5. Step 5: Solve for x
    x = 55,970,907.72/8,378.64
  6. Step 6: Final answer
    x = 6,680.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.