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Finding the Fourth Proportional to 8,480.57, 12,721.19 and 3,215.03

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Solution

The fourth proportional to 8,480.57, 12,721.19 and 3,215.03 is: 4,822.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.57 : 12,721.19 = 3,215.03 : x
  2. Step 2: Convert to fraction form
    8,480.57/12,721.19 = 3,215.03/x
  3. Step 3: Cross multiply
    8,480.57x = 12,721.19 × 3,215.03
  4. Step 4: Simplify right side
    8,480.57x = 40,898,927.80
  5. Step 5: Solve for x
    x = 40,898,927.80/8,480.57
  6. Step 6: Final answer
    x = 4,822.67

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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.