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Finding the Fourth Proportional to 28,267.20, 39,007 and 15,692

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Solution

The fourth proportional to 28,267.20, 39,007 and 15,692 is: 21,654.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,267.20 : 39,007 = 15,692 : x
  2. Step 2: Convert to fraction form
    28,267.20/39,007 = 15,692/x
  3. Step 3: Cross multiply
    28,267.20x = 39,007 × 15,692
  4. Step 4: Simplify right side
    28,267.20x = 612,097,844
  5. Step 5: Solve for x
    x = 612,097,844/28,267.20
  6. Step 6: Final answer
    x = 21,654.00

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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.