Home / 12,990.26-19,481.34-4,223.18

Finding the Fourth Proportional to 12,990.26, 19,481.34 and 4,223.18

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Solution

The fourth proportional to 12,990.26, 19,481.34 and 4,223.18 is: 6,333.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.26 : 19,481.34 = 4,223.18 : x
  2. Step 2: Convert to fraction form
    12,990.26/19,481.34 = 4,223.18/x
  3. Step 3: Cross multiply
    12,990.26x = 19,481.34 × 4,223.18
  4. Step 4: Simplify right side
    12,990.26x = 82,273,205.46
  5. Step 5: Solve for x
    x = 82,273,205.46/12,990.26
  6. Step 6: Final answer
    x = 6,333.45

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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.