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Finding the Fourth Proportional to 28,530, 39,372.30 and 15,954.72

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Solution

The fourth proportional to 28,530, 39,372.30 and 15,954.72 is: 22,018.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530 : 39,372.30 = 15,954.72 : x
  2. Step 2: Convert to fraction form
    28,530/39,372.30 = 15,954.72/x
  3. Step 3: Cross multiply
    28,530x = 39,372.30 × 15,954.72
  4. Step 4: Simplify right side
    28,530x = 628,174,022.26
  5. Step 5: Solve for x
    x = 628,174,022.26/28,530
  6. Step 6: Final answer
    x = 22,018.02

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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.