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Finding the Fourth Proportional to 10,728.40, 16,092.60 and 9,092.20

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Solution

The fourth proportional to 10,728.40, 16,092.60 and 9,092.20 is: 13,638.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,728.40 : 16,092.60 = 9,092.20 : x
  2. Step 2: Convert to fraction form
    10,728.40/16,092.60 = 9,092.20/x
  3. Step 3: Cross multiply
    10,728.40x = 16,092.60 × 9,092.20
  4. Step 4: Simplify right side
    10,728.40x = 146,317,137.72
  5. Step 5: Solve for x
    x = 146,317,137.72/10,728.40
  6. Step 6: Final answer
    x = 13,638.30

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1.5x scale

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.