Home / 20,480.28-30,671.21-11,688.54

Finding the Fourth Proportional to 20,480.28, 30,671.21 and 11,688.54

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Solution

The fourth proportional to 20,480.28, 30,671.21 and 11,688.54 is: 17,504.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.28 : 30,671.21 = 11,688.54 : x
  2. Step 2: Convert to fraction form
    20,480.28/30,671.21 = 11,688.54/x
  3. Step 3: Cross multiply
    20,480.28x = 30,671.21 × 11,688.54
  4. Step 4: Simplify right side
    20,480.28x = 358,501,694.15
  5. Step 5: Solve for x
    x = 358,501,694.15/20,480.28
  6. Step 6: Final answer
    x = 17,504.73

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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.