Home / 18,120.75-27,181.28-5,640.27

Finding the Fourth Proportional to 18,120.75, 27,181.28 and 5,640.27

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Solution

The fourth proportional to 18,120.75, 27,181.28 and 5,640.27 is: 8,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.75 : 27,181.28 = 5,640.27 : x
  2. Step 2: Convert to fraction form
    18,120.75/27,181.28 = 5,640.27/x
  3. Step 3: Cross multiply
    18,120.75x = 27,181.28 × 5,640.27
  4. Step 4: Simplify right side
    18,120.75x = 153,309,758.15
  5. Step 5: Solve for x
    x = 153,309,758.15/18,120.75
  6. Step 6: Final answer
    x = 8,460.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.