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Finding the Fourth Proportional to 18,448.92, 25,459.38 and 10,065.42

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Solution

The fourth proportional to 18,448.92, 25,459.38 and 10,065.42 is: 13,890.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,448.92 : 25,459.38 = 10,065.42 : x
  2. Step 2: Convert to fraction form
    18,448.92/25,459.38 = 10,065.42/x
  3. Step 3: Cross multiply
    18,448.92x = 25,459.38 × 10,065.42
  4. Step 4: Simplify right side
    18,448.92x = 256,259,352.64
  5. Step 5: Solve for x
    x = 256,259,352.64/18,448.92
  6. Step 6: Final answer
    x = 13,890.21

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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.