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Finding the Fourth Proportional to 20,617.49, 28,452.83 and 12,119.49

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Solution

The fourth proportional to 20,617.49, 28,452.83 and 12,119.49 is: 16,725.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.49 : 28,452.83 = 12,119.49 : x
  2. Step 2: Convert to fraction form
    20,617.49/28,452.83 = 12,119.49/x
  3. Step 3: Cross multiply
    20,617.49x = 28,452.83 × 12,119.49
  4. Step 4: Simplify right side
    20,617.49x = 344,833,728.06
  5. Step 5: Solve for x
    x = 344,833,728.06/20,617.49
  6. Step 6: Final answer
    x = 16,725.31

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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.