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Finding the Fourth Proportional to 11,890.60, 16,409.62 and 6,855.64

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Solution

The fourth proportional to 11,890.60, 16,409.62 and 6,855.64 is: 9,461.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,890.60 : 16,409.62 = 6,855.64 : x
  2. Step 2: Convert to fraction form
    11,890.60/16,409.62 = 6,855.64/x
  3. Step 3: Cross multiply
    11,890.60x = 16,409.62 × 6,855.64
  4. Step 4: Simplify right side
    11,890.60x = 112,498,447.26
  5. Step 5: Solve for x
    x = 112,498,447.26/11,890.60
  6. Step 6: Final answer
    x = 9,461.12

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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.