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Finding the Fourth Proportional to 21,980.64, 32,992.56 and 16,120.56

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Solution

The fourth proportional to 21,980.64, 32,992.56 and 16,120.56 is: 24,196.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.64 : 32,992.56 = 16,120.56 : x
  2. Step 2: Convert to fraction form
    21,980.64/32,992.56 = 16,120.56/x
  3. Step 3: Cross multiply
    21,980.64x = 32,992.56 × 16,120.56
  4. Step 4: Simplify right side
    21,980.64x = 531,858,543.03
  5. Step 5: Solve for x
    x = 531,858,543.03/21,980.64
  6. Step 6: Final answer
    x = 24,196.68

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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.