Home / 15,103.97-20,840.37-8,728.28

Finding the Fourth Proportional to 15,103.97, 20,840.37 and 8,728.28

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Solution

The fourth proportional to 15,103.97, 20,840.37 and 8,728.28 is: 12,043.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.97 : 20,840.37 = 8,728.28 : x
  2. Step 2: Convert to fraction form
    15,103.97/20,840.37 = 8,728.28/x
  3. Step 3: Cross multiply
    15,103.97x = 20,840.37 × 8,728.28
  4. Step 4: Simplify right side
    15,103.97x = 181,900,584.66
  5. Step 5: Solve for x
    x = 181,900,584.66/15,103.97
  6. Step 6: Final answer
    x = 12,043.23

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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.