Home / 13,319.94-18,383.76-12,729.45

Finding the Fourth Proportional to 13,319.94, 18,383.76 and 12,729.45

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Solution

The fourth proportional to 13,319.94, 18,383.76 and 12,729.45 is: 17,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.94 : 18,383.76 = 12,729.45 : x
  2. Step 2: Convert to fraction form
    13,319.94/18,383.76 = 12,729.45/x
  3. Step 3: Cross multiply
    13,319.94x = 18,383.76 × 12,729.45
  4. Step 4: Simplify right side
    13,319.94x = 234,015,153.73
  5. Step 5: Solve for x
    x = 234,015,153.73/13,319.94
  6. Step 6: Final answer
    x = 17,568.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.