Home / 9,378-12,942.05-5,186.25

Finding the Fourth Proportional to 9,378, 12,942.05 and 5,186.25

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Solution

The fourth proportional to 9,378, 12,942.05 and 5,186.25 is: 7,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378 : 12,942.05 = 5,186.25 : x
  2. Step 2: Convert to fraction form
    9,378/12,942.05 = 5,186.25/x
  3. Step 3: Cross multiply
    9,378x = 12,942.05 × 5,186.25
  4. Step 4: Simplify right side
    9,378x = 67,120,680.88
  5. Step 5: Solve for x
    x = 67,120,680.88/9,378
  6. Step 6: Final answer
    x = 7,157.25

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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.