Home / 20,496.87-28,284.26-12,111.75

Finding the Fourth Proportional to 20,496.87, 28,284.26 and 12,111.75

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Solution

The fourth proportional to 20,496.87, 28,284.26 and 12,111.75 is: 16,713.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,496.87 : 28,284.26 = 12,111.75 : x
  2. Step 2: Convert to fraction form
    20,496.87/28,284.26 = 12,111.75/x
  3. Step 3: Cross multiply
    20,496.87x = 28,284.26 × 12,111.75
  4. Step 4: Simplify right side
    20,496.87x = 342,571,825.50
  5. Step 5: Solve for x
    x = 342,571,825.50/20,496.87
  6. Step 6: Final answer
    x = 16,713.37

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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.