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Finding the Fourth Proportional to 28,469.46, 42,699.80 and 9,745.20

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Solution

The fourth proportional to 28,469.46, 42,699.80 and 9,745.20 is: 14,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.46 : 42,699.80 = 9,745.20 : x
  2. Step 2: Convert to fraction form
    28,469.46/42,699.80 = 9,745.20/x
  3. Step 3: Cross multiply
    28,469.46x = 42,699.80 × 9,745.20
  4. Step 4: Simplify right side
    28,469.46x = 416,118,090.96
  5. Step 5: Solve for x
    x = 416,118,090.96/28,469.46
  6. Step 6: Final answer
    x = 14,616.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.