Home / 5,079.28-7,620-2,157.60

Finding the Fourth Proportional to 5,079.28, 7,620 and 2,157.60

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Solution

The fourth proportional to 5,079.28, 7,620 and 2,157.60 is: 3,236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.28 : 7,620 = 2,157.60 : x
  2. Step 2: Convert to fraction form
    5,079.28/7,620 = 2,157.60/x
  3. Step 3: Cross multiply
    5,079.28x = 7,620 × 2,157.60
  4. Step 4: Simplify right side
    5,079.28x = 16,440,912
  5. Step 5: Solve for x
    x = 16,440,912/5,079.28
  6. Step 6: Final answer
    x = 3,236.86

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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.