Home / 7,675.20-11,515.68-5,212.80

Finding the Fourth Proportional to 7,675.20, 11,515.68 and 5,212.80

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Solution

The fourth proportional to 7,675.20, 11,515.68 and 5,212.80 is: 7,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,675.20 : 11,515.68 = 5,212.80 : x
  2. Step 2: Convert to fraction form
    7,675.20/11,515.68 = 5,212.80/x
  3. Step 3: Cross multiply
    7,675.20x = 11,515.68 × 5,212.80
  4. Step 4: Simplify right side
    7,675.20x = 60,028,936.70
  5. Step 5: Solve for x
    x = 60,028,936.70/7,675.20
  6. Step 6: Final answer
    x = 7,821.16

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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.