Home / 20,686.83-28,546.99-11,255.41

Finding the Fourth Proportional to 20,686.83, 28,546.99 and 11,255.41

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Solution

The fourth proportional to 20,686.83, 28,546.99 and 11,255.41 is: 15,532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.83 : 28,546.99 = 11,255.41 : x
  2. Step 2: Convert to fraction form
    20,686.83/28,546.99 = 11,255.41/x
  3. Step 3: Cross multiply
    20,686.83x = 28,546.99 × 11,255.41
  4. Step 4: Simplify right side
    20,686.83x = 321,308,076.72
  5. Step 5: Solve for x
    x = 321,308,076.72/20,686.83
  6. Step 6: Final answer
    x = 15,532.01

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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.