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Finding the Third Proportional to 15,400.13 and 17,820

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Solution

The third proportional to 15,400.13 and 17,820 is: 20,620.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.13 : 17,820 = 17,820 : x
  2. Step 2: Convert to fraction form
    15,400.13/17,820 = 17,820/x
  3. Step 3: Cross multiply
    15,400.13x = 17,820 × 17,820
  4. Step 4: Simplify right side
    15,400.13x = 317,552,400
  5. Step 5: Solve for x
    x = 317,552,400/15,400.13
  6. Step 6: Final answer
    x = 20,620.12

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.