Home / 12,821.41-19,236.03-7,761.34

Finding the Fourth Proportional to 12,821.41, 19,236.03 and 7,761.34

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Solution

The fourth proportional to 12,821.41, 19,236.03 and 7,761.34 is: 11,644.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.41 : 19,236.03 = 7,761.34 : x
  2. Step 2: Convert to fraction form
    12,821.41/19,236.03 = 7,761.34/x
  3. Step 3: Cross multiply
    12,821.41x = 19,236.03 × 7,761.34
  4. Step 4: Simplify right side
    12,821.41x = 149,297,369.08
  5. Step 5: Solve for x
    x = 149,297,369.08/12,821.41
  6. Step 6: Final answer
    x = 11,644.38

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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.