Home / 9,080.80-13,621.20-5,185.60

Finding the Fourth Proportional to 9,080.80, 13,621.20 and 5,185.60

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Solution

The fourth proportional to 9,080.80, 13,621.20 and 5,185.60 is: 7,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,080.80 : 13,621.20 = 5,185.60 : x
  2. Step 2: Convert to fraction form
    9,080.80/13,621.20 = 5,185.60/x
  3. Step 3: Cross multiply
    9,080.80x = 13,621.20 × 5,185.60
  4. Step 4: Simplify right side
    9,080.80x = 70,634,094.72
  5. Step 5: Solve for x
    x = 70,634,094.72/9,080.80
  6. Step 6: Final answer
    x = 7,778.40

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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.