Home / 7,851.60-11,771.40-3,958.80

Finding the Fourth Proportional to 7,851.60, 11,771.40 and 3,958.80

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Solution

The fourth proportional to 7,851.60, 11,771.40 and 3,958.80 is: 5,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.60 : 11,771.40 = 3,958.80 : x
  2. Step 2: Convert to fraction form
    7,851.60/11,771.40 = 3,958.80/x
  3. Step 3: Cross multiply
    7,851.60x = 11,771.40 × 3,958.80
  4. Step 4: Simplify right side
    7,851.60x = 46,600,618.32
  5. Step 5: Solve for x
    x = 46,600,618.32/7,851.60
  6. Step 6: Final answer
    x = 5,935.17

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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.