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Finding the Fourth Proportional to 8,940.78, 12,336.48 and 5,404.19

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Solution

The fourth proportional to 8,940.78, 12,336.48 and 5,404.19 is: 7,456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.78 : 12,336.48 = 5,404.19 : x
  2. Step 2: Convert to fraction form
    8,940.78/12,336.48 = 5,404.19/x
  3. Step 3: Cross multiply
    8,940.78x = 12,336.48 × 5,404.19
  4. Step 4: Simplify right side
    8,940.78x = 66,668,681.85
  5. Step 5: Solve for x
    x = 66,668,681.85/8,940.78
  6. Step 6: Final answer
    x = 7,456.70

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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.