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Finding the Third Proportional to 21,115.13 and 28,501.88

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Solution

The third proportional to 21,115.13 and 28,501.88 is: 38,472.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.13 : 28,501.88 = 28,501.88 : x
  2. Step 2: Convert to fraction form
    21,115.13/28,501.88 = 28,501.88/x
  3. Step 3: Cross multiply
    21,115.13x = 28,501.88 × 28,501.88
  4. Step 4: Simplify right side
    21,115.13x = 812,356,878.52
  5. Step 5: Solve for x
    x = 812,356,878.52/21,115.13
  6. Step 6: Final answer
    x = 38,472.75

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These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.