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Finding the Fourth Proportional to 12,438, 17,164.26 and 6,772.59

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Solution

The fourth proportional to 12,438, 17,164.26 and 6,772.59 is: 9,346.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438 : 17,164.26 = 6,772.59 : x
  2. Step 2: Convert to fraction form
    12,438/17,164.26 = 6,772.59/x
  3. Step 3: Cross multiply
    12,438x = 17,164.26 × 6,772.59
  4. Step 4: Simplify right side
    12,438x = 116,246,495.63
  5. Step 5: Solve for x
    x = 116,246,495.63/12,438
  6. Step 6: Final answer
    x = 9,346.08

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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.