Home / 20,311.65-28,027.62-11,235.78

Finding the Fourth Proportional to 20,311.65, 28,027.62 and 11,235.78

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Solution

The fourth proportional to 20,311.65, 28,027.62 and 11,235.78 is: 15,504.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.65 : 28,027.62 = 11,235.78 : x
  2. Step 2: Convert to fraction form
    20,311.65/28,027.62 = 11,235.78/x
  3. Step 3: Cross multiply
    20,311.65x = 28,027.62 × 11,235.78
  4. Step 4: Simplify right side
    20,311.65x = 314,912,172.24
  5. Step 5: Solve for x
    x = 314,912,172.24/20,311.65
  6. Step 6: Final answer
    x = 15,504.02

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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.