Home / 20,750.32-30,993.16-18,772.90

Finding the Fourth Proportional to 20,750.32, 30,993.16 and 18,772.90

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Solution

The fourth proportional to 20,750.32, 30,993.16 and 18,772.90 is: 28,039.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.32 : 30,993.16 = 18,772.90 : x
  2. Step 2: Convert to fraction form
    20,750.32/30,993.16 = 18,772.90/x
  3. Step 3: Cross multiply
    20,750.32x = 30,993.16 × 18,772.90
  4. Step 4: Simplify right side
    20,750.32x = 581,831,493.36
  5. Step 5: Solve for x
    x = 581,831,493.36/20,750.32
  6. Step 6: Final answer
    x = 28,039.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.