Home / 15,021.43-20,729.05-8,647.81

Finding the Fourth Proportional to 15,021.43, 20,729.05 and 8,647.81

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Solution

The fourth proportional to 15,021.43, 20,729.05 and 8,647.81 is: 11,933.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.43 : 20,729.05 = 8,647.81 : x
  2. Step 2: Convert to fraction form
    15,021.43/20,729.05 = 8,647.81/x
  3. Step 3: Cross multiply
    15,021.43x = 20,729.05 × 8,647.81
  4. Step 4: Simplify right side
    15,021.43x = 179,260,812.44
  5. Step 5: Solve for x
    x = 179,260,812.44/15,021.43
  6. Step 6: Final answer
    x = 11,933.67

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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.