Home / 18,243.50-25,125.69-15,724.68

Finding the Fourth Proportional to 18,243.50, 25,125.69 and 15,724.68

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Solution

The fourth proportional to 18,243.50, 25,125.69 and 15,724.68 is: 21,656.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.50 : 25,125.69 = 15,724.68 : x
  2. Step 2: Convert to fraction form
    18,243.50/25,125.69 = 15,724.68/x
  3. Step 3: Cross multiply
    18,243.50x = 25,125.69 × 15,724.68
  4. Step 4: Simplify right side
    18,243.50x = 395,093,435.03
  5. Step 5: Solve for x
    x = 395,093,435.03/18,243.50
  6. Step 6: Final answer
    x = 21,656.67

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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.