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Finding the Fourth Proportional to 7,986.59, 11,980.47 and 3,240.47

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Solution

The fourth proportional to 7,986.59, 11,980.47 and 3,240.47 is: 4,860.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.59 : 11,980.47 = 3,240.47 : x
  2. Step 2: Convert to fraction form
    7,986.59/11,980.47 = 3,240.47/x
  3. Step 3: Cross multiply
    7,986.59x = 11,980.47 × 3,240.47
  4. Step 4: Simplify right side
    7,986.59x = 38,822,353.62
  5. Step 5: Solve for x
    x = 38,822,353.62/7,986.59
  6. Step 6: Final answer
    x = 4,860.94

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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.