Home / 21,246.39-31,868.37-8,100.09

Finding the Fourth Proportional to 21,246.39, 31,868.37 and 8,100.09

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Solution

The fourth proportional to 21,246.39, 31,868.37 and 8,100.09 is: 12,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.39 : 31,868.37 = 8,100.09 : x
  2. Step 2: Convert to fraction form
    21,246.39/31,868.37 = 8,100.09/x
  3. Step 3: Cross multiply
    21,246.39x = 31,868.37 × 8,100.09
  4. Step 4: Simplify right side
    21,246.39x = 258,136,665.15
  5. Step 5: Solve for x
    x = 258,136,665.15/21,246.39
  6. Step 6: Final answer
    x = 12,149.67

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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.