Home / 20,571.84-28,388.88-12,072.45

Finding the Fourth Proportional to 20,571.84, 28,388.88 and 12,072.45

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Solution

The fourth proportional to 20,571.84, 28,388.88 and 12,072.45 is: 16,659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.84 : 28,388.88 = 12,072.45 : x
  2. Step 2: Convert to fraction form
    20,571.84/28,388.88 = 12,072.45/x
  3. Step 3: Cross multiply
    20,571.84x = 28,388.88 × 12,072.45
  4. Step 4: Simplify right side
    20,571.84x = 342,723,334.36
  5. Step 5: Solve for x
    x = 342,723,334.36/20,571.84
  6. Step 6: Final answer
    x = 16,659.83

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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.