Home / 20,846.70-28,738.80-12,884.40

Finding the Fourth Proportional to 20,846.70, 28,738.80 and 12,884.40

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Solution

The fourth proportional to 20,846.70, 28,738.80 and 12,884.40 is: 17,762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.70 : 28,738.80 = 12,884.40 : x
  2. Step 2: Convert to fraction form
    20,846.70/28,738.80 = 12,884.40/x
  3. Step 3: Cross multiply
    20,846.70x = 28,738.80 × 12,884.40
  4. Step 4: Simplify right side
    20,846.70x = 370,282,194.72
  5. Step 5: Solve for x
    x = 370,282,194.72/20,846.70
  6. Step 6: Final answer
    x = 17,762.15

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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.