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Finding the Third Proportional to 15,430.50 and 20,908.13

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Solution

The third proportional to 15,430.50 and 20,908.13 is: 28,330.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.50 : 20,908.13 = 20,908.13 : x
  2. Step 2: Convert to fraction form
    15,430.50/20,908.13 = 20,908.13/x
  3. Step 3: Cross multiply
    15,430.50x = 20,908.13 × 20,908.13
  4. Step 4: Simplify right side
    15,430.50x = 437,149,691.02
  5. Step 5: Solve for x
    x = 437,149,691.02/15,430.50
  6. Step 6: Final answer
    x = 28,330.23

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Why These Related Problems?

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