Home / 9,120.46-13,678.87-2,879.41

Finding the Fourth Proportional to 9,120.46, 13,678.87 and 2,879.41

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Solution

The fourth proportional to 9,120.46, 13,678.87 and 2,879.41 is: 4,318.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.46 : 13,678.87 = 2,879.41 : x
  2. Step 2: Convert to fraction form
    9,120.46/13,678.87 = 2,879.41/x
  3. Step 3: Cross multiply
    9,120.46x = 13,678.87 × 2,879.41
  4. Step 4: Simplify right side
    9,120.46x = 39,387,075.07
  5. Step 5: Solve for x
    x = 39,387,075.07/9,120.46
  6. Step 6: Final answer
    x = 4,318.54

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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.