Home / 6,810.72-9,399.20-5,129.16

Finding the Fourth Proportional to 6,810.72, 9,399.20 and 5,129.16

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Solution

The fourth proportional to 6,810.72, 9,399.20 and 5,129.16 is: 7,078.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,810.72 : 9,399.20 = 5,129.16 : x
  2. Step 2: Convert to fraction form
    6,810.72/9,399.20 = 5,129.16/x
  3. Step 3: Cross multiply
    6,810.72x = 9,399.20 × 5,129.16
  4. Step 4: Simplify right side
    6,810.72x = 48,209,975.03
  5. Step 5: Solve for x
    x = 48,209,975.03/6,810.72
  6. Step 6: Final answer
    x = 7,078.54

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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.