Home / 20,075.75-27,702.29-11,121.03

Finding the Fourth Proportional to 20,075.75, 27,702.29 and 11,121.03

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Solution

The fourth proportional to 20,075.75, 27,702.29 and 11,121.03 is: 15,345.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.75 : 27,702.29 = 11,121.03 : x
  2. Step 2: Convert to fraction form
    20,075.75/27,702.29 = 11,121.03/x
  3. Step 3: Cross multiply
    20,075.75x = 27,702.29 × 11,121.03
  4. Step 4: Simplify right side
    20,075.75x = 308,077,942.55
  5. Step 5: Solve for x
    x = 308,077,942.55/20,075.75
  6. Step 6: Final answer
    x = 15,345.78

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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.