Home / 21,640.43-29,855.42-12,684.67

Finding the Fourth Proportional to 21,640.43, 29,855.42 and 12,684.67

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Solution

The fourth proportional to 21,640.43, 29,855.42 and 12,684.67 is: 17,499.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.43 : 29,855.42 = 12,684.67 : x
  2. Step 2: Convert to fraction form
    21,640.43/29,855.42 = 12,684.67/x
  3. Step 3: Cross multiply
    21,640.43x = 29,855.42 × 12,684.67
  4. Step 4: Simplify right side
    21,640.43x = 378,706,059.92
  5. Step 5: Solve for x
    x = 378,706,059.92/21,640.43
  6. Step 6: Final answer
    x = 17,499.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.