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Finding the Fourth Proportional to 20,750.92, 28,636.54 and 11,319.48

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Solution

The fourth proportional to 20,750.92, 28,636.54 and 11,319.48 is: 15,621.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.92 : 28,636.54 = 11,319.48 : x
  2. Step 2: Convert to fraction form
    20,750.92/28,636.54 = 11,319.48/x
  3. Step 3: Cross multiply
    20,750.92x = 28,636.54 × 11,319.48
  4. Step 4: Simplify right side
    20,750.92x = 324,150,713.50
  5. Step 5: Solve for x
    x = 324,150,713.50/20,750.92
  6. Step 6: Final answer
    x = 15,621.03

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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.