Home / 20,480.66-30,671.78-11,688.92

Finding the Fourth Proportional to 20,480.66, 30,671.78 and 11,688.92

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Solution

The fourth proportional to 20,480.66, 30,671.78 and 11,688.92 is: 17,505.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.66 : 30,671.78 = 11,688.92 : x
  2. Step 2: Convert to fraction form
    20,480.66/30,671.78 = 11,688.92/x
  3. Step 3: Cross multiply
    20,480.66x = 30,671.78 × 11,688.92
  4. Step 4: Simplify right side
    20,480.66x = 358,519,770.87
  5. Step 5: Solve for x
    x = 358,519,770.87/20,480.66
  6. Step 6: Final answer
    x = 17,505.29

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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.