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Finding the Fourth Proportional to 13,383, 18,388.64 and 12,519.14

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Solution

The fourth proportional to 13,383, 18,388.64 and 12,519.14 is: 17,201.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383 : 18,388.64 = 12,519.14 : x
  2. Step 2: Convert to fraction form
    13,383/18,388.64 = 12,519.14/x
  3. Step 3: Cross multiply
    13,383x = 18,388.64 × 12,519.14
  4. Step 4: Simplify right side
    13,383x = 230,209,804.03
  5. Step 5: Solve for x
    x = 230,209,804.03/13,383
  6. Step 6: Final answer
    x = 17,201.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.