Home / 12,990.16-19,481.13-4,223.02

Finding the Fourth Proportional to 12,990.16, 19,481.13 and 4,223.02

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Solution

The fourth proportional to 12,990.16, 19,481.13 and 4,223.02 is: 6,333.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.16 : 19,481.13 = 4,223.02 : x
  2. Step 2: Convert to fraction form
    12,990.16/19,481.13 = 4,223.02/x
  3. Step 3: Cross multiply
    12,990.16x = 19,481.13 × 4,223.02
  4. Step 4: Simplify right side
    12,990.16x = 82,269,201.61
  5. Step 5: Solve for x
    x = 82,269,201.61/12,990.16
  6. Step 6: Final answer
    x = 6,333.19

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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.