Home / 9,145.85-12,621.05-5,112.43

Finding the Fourth Proportional to 9,145.85, 12,621.05 and 5,112.43

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Solution

The fourth proportional to 9,145.85, 12,621.05 and 5,112.43 is: 7,055.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,145.85 : 12,621.05 = 5,112.43 : x
  2. Step 2: Convert to fraction form
    9,145.85/12,621.05 = 5,112.43/x
  3. Step 3: Cross multiply
    9,145.85x = 12,621.05 × 5,112.43
  4. Step 4: Simplify right side
    9,145.85x = 64,524,234.65
  5. Step 5: Solve for x
    x = 64,524,234.65/9,145.85
  6. Step 6: Final answer
    x = 7,055.03

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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.