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Finding the Fourth Proportional to 10,920.60, 15,068.16 and 6,728.04

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Solution

The fourth proportional to 10,920.60, 15,068.16 and 6,728.04 is: 9,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.60 : 15,068.16 = 6,728.04 : x
  2. Step 2: Convert to fraction form
    10,920.60/15,068.16 = 6,728.04/x
  3. Step 3: Cross multiply
    10,920.60x = 15,068.16 × 6,728.04
  4. Step 4: Simplify right side
    10,920.60x = 101,379,183.21
  5. Step 5: Solve for x
    x = 101,379,183.21/10,920.60
  6. Step 6: Final answer
    x = 9,283.30

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