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Finding the Fourth Proportional to 19,992.96, 29,989.44 and 11,214.72

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Solution

The fourth proportional to 19,992.96, 29,989.44 and 11,214.72 is: 16,822.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.96 : 29,989.44 = 11,214.72 : x
  2. Step 2: Convert to fraction form
    19,992.96/29,989.44 = 11,214.72/x
  3. Step 3: Cross multiply
    19,992.96x = 29,989.44 × 11,214.72
  4. Step 4: Simplify right side
    19,992.96x = 336,323,172.56
  5. Step 5: Solve for x
    x = 336,323,172.56/19,992.96
  6. Step 6: Final answer
    x = 16,822.08

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Similar ratio
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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.