Home / 21,183.90-31,800.15-12,873.30

Finding the Fourth Proportional to 21,183.90, 31,800.15 and 12,873.30

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Solution

The fourth proportional to 21,183.90, 31,800.15 and 12,873.30 is: 19,324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.90 : 31,800.15 = 12,873.30 : x
  2. Step 2: Convert to fraction form
    21,183.90/31,800.15 = 12,873.30/x
  3. Step 3: Cross multiply
    21,183.90x = 31,800.15 × 12,873.30
  4. Step 4: Simplify right side
    21,183.90x = 409,372,871.00
  5. Step 5: Solve for x
    x = 409,372,871.00/21,183.90
  6. Step 6: Final answer
    x = 19,324.72

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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.