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Finding the Fourth Proportional to 6,613.66, 9,915.28 and 3,279.63

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Solution

The fourth proportional to 6,613.66, 9,915.28 and 3,279.63 is: 4,916.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.66 : 9,915.28 = 3,279.63 : x
  2. Step 2: Convert to fraction form
    6,613.66/9,915.28 = 3,279.63/x
  3. Step 3: Cross multiply
    6,613.66x = 9,915.28 × 3,279.63
  4. Step 4: Simplify right side
    6,613.66x = 32,518,449.75
  5. Step 5: Solve for x
    x = 32,518,449.75/6,613.66
  6. Step 6: Final answer
    x = 4,916.86

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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.