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Finding the Fourth Proportional to 12,169.36, 16,785.36 and 7,456

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Solution

The fourth proportional to 12,169.36, 16,785.36 and 7,456 is: 10,284.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.36 : 16,785.36 = 7,456 : x
  2. Step 2: Convert to fraction form
    12,169.36/16,785.36 = 7,456/x
  3. Step 3: Cross multiply
    12,169.36x = 16,785.36 × 7,456
  4. Step 4: Simplify right side
    12,169.36x = 125,151,644.16
  5. Step 5: Solve for x
    x = 125,151,644.16/12,169.36
  6. Step 6: Final answer
    x = 10,284.16

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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.