Home / 18,728.29-25,855.41-12,768.72

Finding the Fourth Proportional to 18,728.29, 25,855.41 and 12,768.72

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Solution

The fourth proportional to 18,728.29, 25,855.41 and 12,768.72 is: 17,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.29 : 25,855.41 = 12,768.72 : x
  2. Step 2: Convert to fraction form
    18,728.29/25,855.41 = 12,768.72/x
  3. Step 3: Cross multiply
    18,728.29x = 25,855.41 × 12,768.72
  4. Step 4: Simplify right side
    18,728.29x = 330,140,361.50
  5. Step 5: Solve for x
    x = 330,140,361.50/18,728.29
  6. Step 6: Final answer
    x = 17,627.90

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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.