Home / 6,515.10-8,990.46-3,720.60

Finding the Fourth Proportional to 6,515.10, 8,990.46 and 3,720.60

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Solution

The fourth proportional to 6,515.10, 8,990.46 and 3,720.60 is: 5,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515.10 : 8,990.46 = 3,720.60 : x
  2. Step 2: Convert to fraction form
    6,515.10/8,990.46 = 3,720.60/x
  3. Step 3: Cross multiply
    6,515.10x = 8,990.46 × 3,720.60
  4. Step 4: Simplify right side
    6,515.10x = 33,449,905.48
  5. Step 5: Solve for x
    x = 33,449,905.48/6,515.10
  6. Step 6: Final answer
    x = 5,134.21

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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.