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Finding the Fourth Proportional to 6,664, 9,196.32 and 3,720

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Solution

The fourth proportional to 6,664, 9,196.32 and 3,720 is: 5,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,664 : 9,196.32 = 3,720 : x
  2. Step 2: Convert to fraction form
    6,664/9,196.32 = 3,720/x
  3. Step 3: Cross multiply
    6,664x = 9,196.32 × 3,720
  4. Step 4: Simplify right side
    6,664x = 34,210,310.40
  5. Step 5: Solve for x
    x = 34,210,310.40/6,664
  6. Step 6: Final answer
    x = 5,133.60

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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.