Home / 7,981.40-11,964.72-4,077.20

Finding the Fourth Proportional to 7,981.40, 11,964.72 and 4,077.20

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Solution

The fourth proportional to 7,981.40, 11,964.72 and 4,077.20 is: 6,112.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.40 : 11,964.72 = 4,077.20 : x
  2. Step 2: Convert to fraction form
    7,981.40/11,964.72 = 4,077.20/x
  3. Step 3: Cross multiply
    7,981.40x = 11,964.72 × 4,077.20
  4. Step 4: Simplify right side
    7,981.40x = 48,782,556.38
  5. Step 5: Solve for x
    x = 48,782,556.38/7,981.40
  6. Step 6: Final answer
    x = 6,112.03

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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.