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Finding the Fourth Proportional to 18,825.51, 28,208.25 and 9,940.52

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Solution

The fourth proportional to 18,825.51, 28,208.25 and 9,940.52 is: 14,894.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825.51 : 28,208.25 = 9,940.52 : x
  2. Step 2: Convert to fraction form
    18,825.51/28,208.25 = 9,940.52/x
  3. Step 3: Cross multiply
    18,825.51x = 28,208.25 × 9,940.52
  4. Step 4: Simplify right side
    18,825.51x = 280,404,743.81
  5. Step 5: Solve for x
    x = 280,404,743.81/18,825.51
  6. Step 6: Final answer
    x = 14,894.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.