Home / 20,075.52-27,705.78-11,123.85

Finding the Fourth Proportional to 20,075.52, 27,705.78 and 11,123.85

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Solution

The fourth proportional to 20,075.52, 27,705.78 and 11,123.85 is: 15,351.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.52 : 27,705.78 = 11,123.85 : x
  2. Step 2: Convert to fraction form
    20,075.52/27,705.78 = 11,123.85/x
  3. Step 3: Cross multiply
    20,075.52x = 27,705.78 × 11,123.85
  4. Step 4: Simplify right side
    20,075.52x = 308,194,940.85
  5. Step 5: Solve for x
    x = 308,194,940.85/20,075.52
  6. Step 6: Final answer
    x = 15,351.78

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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.