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Finding the Fourth Proportional to 15,403.80, 23,073.30 and 12,811.80

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Solution

The fourth proportional to 15,403.80, 23,073.30 and 12,811.80 is: 19,190.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.80 : 23,073.30 = 12,811.80 : x
  2. Step 2: Convert to fraction form
    15,403.80/23,073.30 = 12,811.80/x
  3. Step 3: Cross multiply
    15,403.80x = 23,073.30 × 12,811.80
  4. Step 4: Simplify right side
    15,403.80x = 295,610,504.94
  5. Step 5: Solve for x
    x = 295,610,504.94/15,403.80
  6. Step 6: Final answer
    x = 19,190.75

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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.