Home / 18,789.75-25,930.71-10,406.25

Finding the Fourth Proportional to 18,789.75, 25,930.71 and 10,406.25

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Solution

The fourth proportional to 18,789.75, 25,930.71 and 10,406.25 is: 14,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.75 : 25,930.71 = 10,406.25 : x
  2. Step 2: Convert to fraction form
    18,789.75/25,930.71 = 10,406.25/x
  3. Step 3: Cross multiply
    18,789.75x = 25,930.71 × 10,406.25
  4. Step 4: Simplify right side
    18,789.75x = 269,841,450.94
  5. Step 5: Solve for x
    x = 269,841,450.94/18,789.75
  6. Step 6: Final answer
    x = 14,361.10

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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.