Home / 4,881.20-7,321.80-2,807.60

Finding the Fourth Proportional to 4,881.20, 7,321.80 and 2,807.60

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Solution

The fourth proportional to 4,881.20, 7,321.80 and 2,807.60 is: 4,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.20 : 7,321.80 = 2,807.60 : x
  2. Step 2: Convert to fraction form
    4,881.20/7,321.80 = 2,807.60/x
  3. Step 3: Cross multiply
    4,881.20x = 7,321.80 × 2,807.60
  4. Step 4: Simplify right side
    4,881.20x = 20,556,685.68
  5. Step 5: Solve for x
    x = 20,556,685.68/4,881.20
  6. Step 6: Final answer
    x = 4,211.40

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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.