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Finding the Fourth Proportional to 20,907, 28,850.94 and 11,346.48

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Solution

The fourth proportional to 20,907, 28,850.94 and 11,346.48 is: 15,657.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907 : 28,850.94 = 11,346.48 : x
  2. Step 2: Convert to fraction form
    20,907/28,850.94 = 11,346.48/x
  3. Step 3: Cross multiply
    20,907x = 28,850.94 × 11,346.48
  4. Step 4: Simplify right side
    20,907x = 327,356,613.69
  5. Step 5: Solve for x
    x = 327,356,613.69/20,907
  6. Step 6: Final answer
    x = 15,657.75

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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.