Home / 7,138.26-9,851.49-4,485.78

Finding the Fourth Proportional to 7,138.26, 9,851.49 and 4,485.78

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Solution

The fourth proportional to 7,138.26, 9,851.49 and 4,485.78 is: 6,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.26 : 9,851.49 = 4,485.78 : x
  2. Step 2: Convert to fraction form
    7,138.26/9,851.49 = 4,485.78/x
  3. Step 3: Cross multiply
    7,138.26x = 9,851.49 × 4,485.78
  4. Step 4: Simplify right side
    7,138.26x = 44,191,616.81
  5. Step 5: Solve for x
    x = 44,191,616.81/7,138.26
  6. Step 6: Final answer
    x = 6,190.81

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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.