Home / 20,845.09-28,769-12,346.53

Finding the Fourth Proportional to 20,845.09, 28,769 and 12,346.53

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Solution

The fourth proportional to 20,845.09, 28,769 and 12,346.53 is: 17,039.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.09 : 28,769 = 12,346.53 : x
  2. Step 2: Convert to fraction form
    20,845.09/28,769 = 12,346.53/x
  3. Step 3: Cross multiply
    20,845.09x = 28,769 × 12,346.53
  4. Step 4: Simplify right side
    20,845.09x = 355,197,321.57
  5. Step 5: Solve for x
    x = 355,197,321.57/20,845.09
  6. Step 6: Final answer
    x = 17,039.86

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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.