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Finding the Fourth Proportional to 28,469.59, 39,285.05 and 16,530.59

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Solution

The fourth proportional to 28,469.59, 39,285.05 and 16,530.59 is: 22,810.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.59 : 39,285.05 = 16,530.59 : x
  2. Step 2: Convert to fraction form
    28,469.59/39,285.05 = 16,530.59/x
  3. Step 3: Cross multiply
    28,469.59x = 39,285.05 × 16,530.59
  4. Step 4: Simplify right side
    28,469.59x = 649,405,054.68
  5. Step 5: Solve for x
    x = 649,405,054.68/28,469.59
  6. Step 6: Final answer
    x = 22,810.48

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1.5x scale

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.