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Finding the Fourth Proportional to 18,395.96, 25,386.97 and 13,028

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Solution

The fourth proportional to 18,395.96, 25,386.97 and 13,028 is: 17,979.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,395.96 : 25,386.97 = 13,028 : x
  2. Step 2: Convert to fraction form
    18,395.96/25,386.97 = 13,028/x
  3. Step 3: Cross multiply
    18,395.96x = 25,386.97 × 13,028
  4. Step 4: Simplify right side
    18,395.96x = 330,741,412.59
  5. Step 5: Solve for x
    x = 330,741,412.59/18,395.96
  6. Step 6: Final answer
    x = 17,979.02

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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.