Home / 20,706.99-28,571.85-12,211.79

Finding the Fourth Proportional to 20,706.99, 28,571.85 and 12,211.79

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Solution

The fourth proportional to 20,706.99, 28,571.85 and 12,211.79 is: 16,850.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.99 : 28,571.85 = 12,211.79 : x
  2. Step 2: Convert to fraction form
    20,706.99/28,571.85 = 12,211.79/x
  3. Step 3: Cross multiply
    20,706.99x = 28,571.85 × 12,211.79
  4. Step 4: Simplify right side
    20,706.99x = 348,913,289.25
  5. Step 5: Solve for x
    x = 348,913,289.25/20,706.99
  6. Step 6: Final answer
    x = 16,850.02

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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.