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Finding the Fourth Proportional to 11,620.60, 16,028.18 and 7,146.88

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Solution

The fourth proportional to 11,620.60, 16,028.18 and 7,146.88 is: 9,857.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,620.60 : 16,028.18 = 7,146.88 : x
  2. Step 2: Convert to fraction form
    11,620.60/16,028.18 = 7,146.88/x
  3. Step 3: Cross multiply
    11,620.60x = 16,028.18 × 7,146.88
  4. Step 4: Simplify right side
    11,620.60x = 114,551,479.08
  5. Step 5: Solve for x
    x = 114,551,479.08/11,620.60
  6. Step 6: Final answer
    x = 9,857.62

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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.