Home / 18,759.06-25,872.55-15,935.78

Finding the Fourth Proportional to 18,759.06, 25,872.55 and 15,935.78

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Solution

The fourth proportional to 18,759.06, 25,872.55 and 15,935.78 is: 21,978.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.06 : 25,872.55 = 15,935.78 : x
  2. Step 2: Convert to fraction form
    18,759.06/25,872.55 = 15,935.78/x
  3. Step 3: Cross multiply
    18,759.06x = 25,872.55 × 15,935.78
  4. Step 4: Simplify right side
    18,759.06x = 412,299,055.80
  5. Step 5: Solve for x
    x = 412,299,055.80/18,759.06
  6. Step 6: Final answer
    x = 21,978.67

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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.