Home / 20,846.89-28,767.18-12,889.32

Finding the Fourth Proportional to 20,846.89, 28,767.18 and 12,889.32

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Solution

The fourth proportional to 20,846.89, 28,767.18 and 12,889.32 is: 17,786.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.89 : 28,767.18 = 12,889.32 : x
  2. Step 2: Convert to fraction form
    20,846.89/28,767.18 = 12,889.32/x
  3. Step 3: Cross multiply
    20,846.89x = 28,767.18 × 12,889.32
  4. Step 4: Simplify right side
    20,846.89x = 370,789,388.52
  5. Step 5: Solve for x
    x = 370,789,388.52/20,846.89
  6. Step 6: Final answer
    x = 17,786.32

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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.