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Finding the Third Proportional to 18,811.13 and 28,124.72

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Solution

The third proportional to 18,811.13 and 28,124.72 is: 42,049.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.13 : 28,124.72 = 28,124.72 : x
  2. Step 2: Convert to fraction form
    18,811.13/28,124.72 = 28,124.72/x
  3. Step 3: Cross multiply
    18,811.13x = 28,124.72 × 28,124.72
  4. Step 4: Simplify right side
    18,811.13x = 790,999,804.77
  5. Step 5: Solve for x
    x = 790,999,804.77/18,811.13
  6. Step 6: Final answer
    x = 42,049.57

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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.