Home / 28,172.56-42,217.12-11,512.48

Finding the Fourth Proportional to 28,172.56, 42,217.12 and 11,512.48

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Solution

The fourth proportional to 28,172.56, 42,217.12 and 11,512.48 is: 17,251.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.56 : 42,217.12 = 11,512.48 : x
  2. Step 2: Convert to fraction form
    28,172.56/42,217.12 = 11,512.48/x
  3. Step 3: Cross multiply
    28,172.56x = 42,217.12 × 11,512.48
  4. Step 4: Simplify right side
    28,172.56x = 486,023,749.66
  5. Step 5: Solve for x
    x = 486,023,749.66/28,172.56
  6. Step 6: Final answer
    x = 17,251.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.