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Finding the Fourth Proportional to 28,362.96, 39,105.48 and 18,274

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Solution

The fourth proportional to 28,362.96, 39,105.48 and 18,274 is: 25,195.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.96 : 39,105.48 = 18,274 : x
  2. Step 2: Convert to fraction form
    28,362.96/39,105.48 = 18,274/x
  3. Step 3: Cross multiply
    28,362.96x = 39,105.48 × 18,274
  4. Step 4: Simplify right side
    28,362.96x = 714,613,541.52
  5. Step 5: Solve for x
    x = 714,613,541.52/28,362.96
  6. Step 6: Final answer
    x = 25,195.31

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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.