Home / 13,729.24-18,949.49-7,764.40

Finding the Fourth Proportional to 13,729.24, 18,949.49 and 7,764.40

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Solution

The fourth proportional to 13,729.24, 18,949.49 and 7,764.40 is: 10,716.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.24 : 18,949.49 = 7,764.40 : x
  2. Step 2: Convert to fraction form
    13,729.24/18,949.49 = 7,764.40/x
  3. Step 3: Cross multiply
    13,729.24x = 18,949.49 × 7,764.40
  4. Step 4: Simplify right side
    13,729.24x = 147,131,420.16
  5. Step 5: Solve for x
    x = 147,131,420.16/13,729.24
  6. Step 6: Final answer
    x = 10,716.65

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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.