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Finding the Fourth Proportional to 7,690.69, 10,613.15 and 4,153.91

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Solution

The fourth proportional to 7,690.69, 10,613.15 and 4,153.91 is: 5,732.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.69 : 10,613.15 = 4,153.91 : x
  2. Step 2: Convert to fraction form
    7,690.69/10,613.15 = 4,153.91/x
  3. Step 3: Cross multiply
    7,690.69x = 10,613.15 × 4,153.91
  4. Step 4: Simplify right side
    7,690.69x = 44,086,069.92
  5. Step 5: Solve for x
    x = 44,086,069.92/7,690.69
  6. Step 6: Final answer
    x = 5,732.39

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Double scale
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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.