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Finding the Fourth Proportional to 30,921.73, 42,673.03 and 18,174.72

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Solution

The fourth proportional to 30,921.73, 42,673.03 and 18,174.72 is: 25,081.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,921.73 : 42,673.03 = 18,174.72 : x
  2. Step 2: Convert to fraction form
    30,921.73/42,673.03 = 18,174.72/x
  3. Step 3: Cross multiply
    30,921.73x = 42,673.03 × 18,174.72
  4. Step 4: Simplify right side
    30,921.73x = 775,570,486.39
  5. Step 5: Solve for x
    x = 775,570,486.39/30,921.73
  6. Step 6: Final answer
    x = 25,081.73

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1.5x scale

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.