Home / 20,480.94-30,711.78-12,162.06

Finding the Fourth Proportional to 20,480.94, 30,711.78 and 12,162.06

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Solution

The fourth proportional to 20,480.94, 30,711.78 and 12,162.06 is: 18,237.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.94 : 30,711.78 = 12,162.06 : x
  2. Step 2: Convert to fraction form
    20,480.94/30,711.78 = 12,162.06/x
  3. Step 3: Cross multiply
    20,480.94x = 30,711.78 × 12,162.06
  4. Step 4: Simplify right side
    20,480.94x = 373,518,511.07
  5. Step 5: Solve for x
    x = 373,518,511.07/20,480.94
  6. Step 6: Final answer
    x = 18,237.37

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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.