Home / 18,626.58-25,704.81-10,128.78

Finding the Fourth Proportional to 18,626.58, 25,704.81 and 10,128.78

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Solution

The fourth proportional to 18,626.58, 25,704.81 and 10,128.78 is: 13,977.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.58 : 25,704.81 = 10,128.78 : x
  2. Step 2: Convert to fraction form
    18,626.58/25,704.81 = 10,128.78/x
  3. Step 3: Cross multiply
    18,626.58x = 25,704.81 × 10,128.78
  4. Step 4: Simplify right side
    18,626.58x = 260,358,365.43
  5. Step 5: Solve for x
    x = 260,358,365.43/18,626.58
  6. Step 6: Final answer
    x = 13,977.79

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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.