Home / 7,113.34-10,668.79-1,918

Finding the Fourth Proportional to 7,113.34, 10,668.79 and 1,918

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Solution

The fourth proportional to 7,113.34, 10,668.79 and 1,918 is: 2,876.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.34 : 10,668.79 = 1,918 : x
  2. Step 2: Convert to fraction form
    7,113.34/10,668.79 = 1,918/x
  3. Step 3: Cross multiply
    7,113.34x = 10,668.79 × 1,918
  4. Step 4: Simplify right side
    7,113.34x = 20,462,739.22
  5. Step 5: Solve for x
    x = 20,462,739.22/7,113.34
  6. Step 6: Final answer
    x = 2,876.67

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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.