Home / 20,846.36-28,768.20-12,886.76

Finding the Fourth Proportional to 20,846.36, 28,768.20 and 12,886.76

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Solution

The fourth proportional to 20,846.36, 28,768.20 and 12,886.76 is: 17,783.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.36 : 28,768.20 = 12,886.76 : x
  2. Step 2: Convert to fraction form
    20,846.36/28,768.20 = 12,886.76/x
  3. Step 3: Cross multiply
    20,846.36x = 28,768.20 × 12,886.76
  4. Step 4: Simplify right side
    20,846.36x = 370,728,889.03
  5. Step 5: Solve for x
    x = 370,728,889.03/20,846.36
  6. Step 6: Final answer
    x = 17,783.87

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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.