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Finding the Fourth Proportional to 6,613.69, 9,127.19 and 3,960.58

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Solution

The fourth proportional to 6,613.69, 9,127.19 and 3,960.58 is: 5,465.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.69 : 9,127.19 = 3,960.58 : x
  2. Step 2: Convert to fraction form
    6,613.69/9,127.19 = 3,960.58/x
  3. Step 3: Cross multiply
    6,613.69x = 9,127.19 × 3,960.58
  4. Step 4: Simplify right side
    6,613.69x = 36,148,966.17
  5. Step 5: Solve for x
    x = 36,148,966.17/6,613.69
  6. Step 6: Final answer
    x = 5,465.78

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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.