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Finding the Fourth Proportional to 8,812.92, 13,220.60 and 2,971.20

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Solution

The fourth proportional to 8,812.92, 13,220.60 and 2,971.20 is: 4,457.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.92 : 13,220.60 = 2,971.20 : x
  2. Step 2: Convert to fraction form
    8,812.92/13,220.60 = 2,971.20/x
  3. Step 3: Cross multiply
    8,812.92x = 13,220.60 × 2,971.20
  4. Step 4: Simplify right side
    8,812.92x = 39,281,046.72
  5. Step 5: Solve for x
    x = 39,281,046.72/8,812.92
  6. Step 6: Final answer
    x = 4,457.21

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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.