Home / 4,812.40-7,218.60-3,991.60

Finding the Fourth Proportional to 4,812.40, 7,218.60 and 3,991.60

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Solution

The fourth proportional to 4,812.40, 7,218.60 and 3,991.60 is: 5,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,812.40 : 7,218.60 = 3,991.60 : x
  2. Step 2: Convert to fraction form
    4,812.40/7,218.60 = 3,991.60/x
  3. Step 3: Cross multiply
    4,812.40x = 7,218.60 × 3,991.60
  4. Step 4: Simplify right side
    4,812.40x = 28,813,763.76
  5. Step 5: Solve for x
    x = 28,813,763.76/4,812.40
  6. Step 6: Final answer
    x = 5,987.40

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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.