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Finding the Fourth Proportional to 15,999.75, 23,980.16 and 11,321.11

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Solution

The fourth proportional to 15,999.75, 23,980.16 and 11,321.11 is: 16,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.75 : 23,980.16 = 11,321.11 : x
  2. Step 2: Convert to fraction form
    15,999.75/23,980.16 = 11,321.11/x
  3. Step 3: Cross multiply
    15,999.75x = 23,980.16 × 11,321.11
  4. Step 4: Simplify right side
    15,999.75x = 271,481,852.67
  5. Step 5: Solve for x
    x = 271,481,852.67/15,999.75
  6. Step 6: Final answer
    x = 16,967.89

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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.