Home / 20,315.75-28,033.21-11,361.81

Finding the Fourth Proportional to 20,315.75, 28,033.21 and 11,361.81

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Solution

The fourth proportional to 20,315.75, 28,033.21 and 11,361.81 is: 15,677.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.75 : 28,033.21 = 11,361.81 : x
  2. Step 2: Convert to fraction form
    20,315.75/28,033.21 = 11,361.81/x
  3. Step 3: Cross multiply
    20,315.75x = 28,033.21 × 11,361.81
  4. Step 4: Simplify right side
    20,315.75x = 318,507,977.31
  5. Step 5: Solve for x
    x = 318,507,977.31/20,315.75
  6. Step 6: Final answer
    x = 15,677.88

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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.