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Finding the Fourth Proportional to 10,992.40, 16,485.40 and 3,971.60

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Solution

The fourth proportional to 10,992.40, 16,485.40 and 3,971.60 is: 5,956.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,992.40 : 16,485.40 = 3,971.60 : x
  2. Step 2: Convert to fraction form
    10,992.40/16,485.40 = 3,971.60/x
  3. Step 3: Cross multiply
    10,992.40x = 16,485.40 × 3,971.60
  4. Step 4: Simplify right side
    10,992.40x = 65,473,414.64
  5. Step 5: Solve for x
    x = 65,473,414.64/10,992.40
  6. Step 6: Final answer
    x = 5,956.24

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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.