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Finding the Fourth Proportional to 8,939.21, 12,336.21 and 4,960.22

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Solution

The fourth proportional to 8,939.21, 12,336.21 and 4,960.22 is: 6,845.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.21 : 12,336.21 = 4,960.22 : x
  2. Step 2: Convert to fraction form
    8,939.21/12,336.21 = 4,960.22/x
  3. Step 3: Cross multiply
    8,939.21x = 12,336.21 × 4,960.22
  4. Step 4: Simplify right side
    8,939.21x = 61,190,253.89
  5. Step 5: Solve for x
    x = 61,190,253.89/8,939.21
  6. Step 6: Final answer
    x = 6,845.16

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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.