Home / 8,668.89-13,002.12-3,121.40

Finding the Fourth Proportional to 8,668.89, 13,002.12 and 3,121.40

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Solution

The fourth proportional to 8,668.89, 13,002.12 and 3,121.40 is: 4,681.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.89 : 13,002.12 = 3,121.40 : x
  2. Step 2: Convert to fraction form
    8,668.89/13,002.12 = 3,121.40/x
  3. Step 3: Cross multiply
    8,668.89x = 13,002.12 × 3,121.40
  4. Step 4: Simplify right side
    8,668.89x = 40,584,849.87
  5. Step 5: Solve for x
    x = 40,584,849.87/8,668.89
  6. Step 6: Final answer
    x = 4,681.67

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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.