Home / 20,218.11-30,321.32-6,890.81

Finding the Fourth Proportional to 20,218.11, 30,321.32 and 6,890.81

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Solution

The fourth proportional to 20,218.11, 30,321.32 and 6,890.81 is: 10,334.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.11 : 30,321.32 = 6,890.81 : x
  2. Step 2: Convert to fraction form
    20,218.11/30,321.32 = 6,890.81/x
  3. Step 3: Cross multiply
    20,218.11x = 30,321.32 × 6,890.81
  4. Step 4: Simplify right side
    20,218.11x = 208,938,455.07
  5. Step 5: Solve for x
    x = 208,938,455.07/20,218.11
  6. Step 6: Final answer
    x = 10,334.22

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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.