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Finding the Fourth Proportional to 8,999.20, 13,492.40 and 3,450.40

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Solution

The fourth proportional to 8,999.20, 13,492.40 and 3,450.40 is: 5,173.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.20 : 13,492.40 = 3,450.40 : x
  2. Step 2: Convert to fraction form
    8,999.20/13,492.40 = 3,450.40/x
  3. Step 3: Cross multiply
    8,999.20x = 13,492.40 × 3,450.40
  4. Step 4: Simplify right side
    8,999.20x = 46,554,176.96
  5. Step 5: Solve for x
    x = 46,554,176.96/8,999.20
  6. Step 6: Final answer
    x = 5,173.15

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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.