Home / 13,170.12-19,729.13-6,920.79

Finding the Fourth Proportional to 13,170.12, 19,729.13 and 6,920.79

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Solution

The fourth proportional to 13,170.12, 19,729.13 and 6,920.79 is: 10,367.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.12 : 19,729.13 = 6,920.79 : x
  2. Step 2: Convert to fraction form
    13,170.12/19,729.13 = 6,920.79/x
  3. Step 3: Cross multiply
    13,170.12x = 19,729.13 × 6,920.79
  4. Step 4: Simplify right side
    13,170.12x = 136,541,131.01
  5. Step 5: Solve for x
    x = 136,541,131.01/13,170.12
  6. Step 6: Final answer
    x = 10,367.49

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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.