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Finding the Fourth Proportional to 28,372, 39,154.08 and 15,796.48

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Solution

The fourth proportional to 28,372, 39,154.08 and 15,796.48 is: 21,799.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372 : 39,154.08 = 15,796.48 : x
  2. Step 2: Convert to fraction form
    28,372/39,154.08 = 15,796.48/x
  3. Step 3: Cross multiply
    28,372x = 39,154.08 × 15,796.48
  4. Step 4: Simplify right side
    28,372x = 618,496,641.64
  5. Step 5: Solve for x
    x = 618,496,641.64/28,372
  6. Step 6: Final answer
    x = 21,799.54

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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.