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Finding the Fourth Proportional to 8,720.70, 13,073.07 and 3,788.57

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Solution

The fourth proportional to 8,720.70, 13,073.07 and 3,788.57 is: 5,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.70 : 13,073.07 = 3,788.57 : x
  2. Step 2: Convert to fraction form
    8,720.70/13,073.07 = 3,788.57/x
  3. Step 3: Cross multiply
    8,720.70x = 13,073.07 × 3,788.57
  4. Step 4: Simplify right side
    8,720.70x = 49,528,240.81
  5. Step 5: Solve for x
    x = 49,528,240.81/8,720.70
  6. Step 6: Final answer
    x = 5,679.39

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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.