Home / 20,922.10-28,872.38-11,361.90

Finding the Fourth Proportional to 20,922.10, 28,872.38 and 11,361.90

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Solution

The fourth proportional to 20,922.10, 28,872.38 and 11,361.90 is: 15,679.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.10 : 28,872.38 = 11,361.90 : x
  2. Step 2: Convert to fraction form
    20,922.10/28,872.38 = 11,361.90/x
  3. Step 3: Cross multiply
    20,922.10x = 28,872.38 × 11,361.90
  4. Step 4: Simplify right side
    20,922.10x = 328,045,094.32
  5. Step 5: Solve for x
    x = 328,045,094.32/20,922.10
  6. Step 6: Final answer
    x = 15,679.36

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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.