Home / 18,511.50-25,546.41-10,128.54

Finding the Fourth Proportional to 18,511.50, 25,546.41 and 10,128.54

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Solution

The fourth proportional to 18,511.50, 25,546.41 and 10,128.54 is: 13,977.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.50 : 25,546.41 = 10,128.54 : x
  2. Step 2: Convert to fraction form
    18,511.50/25,546.41 = 10,128.54/x
  3. Step 3: Cross multiply
    18,511.50x = 25,546.41 × 10,128.54
  4. Step 4: Simplify right side
    18,511.50x = 258,747,835.54
  5. Step 5: Solve for x
    x = 258,747,835.54/18,511.50
  6. Step 6: Final answer
    x = 13,977.68

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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.