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Finding the Fourth Proportional to 28,469.31, 39,284.65 and 16,530.31

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Solution

The fourth proportional to 28,469.31, 39,284.65 and 16,530.31 is: 22,810.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.31 : 39,284.65 = 16,530.31 : x
  2. Step 2: Convert to fraction form
    28,469.31/39,284.65 = 16,530.31/x
  3. Step 3: Cross multiply
    28,469.31x = 39,284.65 × 16,530.31
  4. Step 4: Simplify right side
    28,469.31x = 649,387,442.74
  5. Step 5: Solve for x
    x = 649,387,442.74/28,469.31
  6. Step 6: Final answer
    x = 22,810.09

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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.