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Finding the Fourth Proportional to 18,765.94, 28,157.08 and 11,762.00

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Solution

The fourth proportional to 18,765.94, 28,157.08 and 11,762.00 is: 17,648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.94 : 28,157.08 = 11,762.00 : x
  2. Step 2: Convert to fraction form
    18,765.94/28,157.08 = 11,762.00/x
  3. Step 3: Cross multiply
    18,765.94x = 28,157.08 × 11,762.00
  4. Step 4: Simplify right side
    18,765.94x = 331,183,615.95
  5. Step 5: Solve for x
    x = 331,183,615.95/18,765.94
  6. Step 6: Final answer
    x = 17,648.13

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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.