Home / 10,518.05-15,777-2,620.51

Finding the Fourth Proportional to 10,518.05, 15,777 and 2,620.51

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Solution

The fourth proportional to 10,518.05, 15,777 and 2,620.51 is: 3,930.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.05 : 15,777 = 2,620.51 : x
  2. Step 2: Convert to fraction form
    10,518.05/15,777 = 2,620.51/x
  3. Step 3: Cross multiply
    10,518.05x = 15,777 × 2,620.51
  4. Step 4: Simplify right side
    10,518.05x = 41,343,786.27
  5. Step 5: Solve for x
    x = 41,343,786.27/10,518.05
  6. Step 6: Final answer
    x = 3,930.75

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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.