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Finding the Fourth Proportional to 8,980.89, 12,392.92 and 5,396.03

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Solution

The fourth proportional to 8,980.89, 12,392.92 and 5,396.03 is: 7,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.89 : 12,392.92 = 5,396.03 : x
  2. Step 2: Convert to fraction form
    8,980.89/12,392.92 = 5,396.03/x
  3. Step 3: Cross multiply
    8,980.89x = 12,392.92 × 5,396.03
  4. Step 4: Simplify right side
    8,980.89x = 66,872,568.11
  5. Step 5: Solve for x
    x = 66,872,568.11/8,980.89
  6. Step 6: Final answer
    x = 7,446.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.