Home / 7,821,980.60-11,718,974.10-6,618,255.80

Finding the Fourth Proportional to 7,821,980.60, 11,718,974.10 and 6,618,255.80

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Solution

The fourth proportional to 7,821,980.60, 11,718,974.10 and 6,618,255.80 is: 9,915,540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821,980.60 : 11,718,974.10 = 6,618,255.80 : x
  2. Step 2: Convert to fraction form
    7,821,980.60/11,718,974.10 = 6,618,255.80/x
  3. Step 3: Cross multiply
    7,821,980.60x = 11,718,974.10 × 6,618,255.80
  4. Step 4: Simplify right side
    7,821,980.60x = 77,559,168,307,374.78
  5. Step 5: Solve for x
    x = 77,559,168,307,374.78/7,821,980.60
  6. Step 6: Final answer
    x = 9,915,540.87

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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.