Home / 20,768.49-31,161.87-10,905.48

Finding the Fourth Proportional to 20,768.49, 31,161.87 and 10,905.48

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Solution

The fourth proportional to 20,768.49, 31,161.87 and 10,905.48 is: 16,363.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.49 : 31,161.87 = 10,905.48 : x
  2. Step 2: Convert to fraction form
    20,768.49/31,161.87 = 10,905.48/x
  3. Step 3: Cross multiply
    20,768.49x = 31,161.87 × 10,905.48
  4. Step 4: Simplify right side
    20,768.49x = 339,835,150.05
  5. Step 5: Solve for x
    x = 339,835,150.05/20,768.49
  6. Step 6: Final answer
    x = 16,363.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.