Home / 13,721.56-18,933.67-7,751.05

Finding the Fourth Proportional to 13,721.56, 18,933.67 and 7,751.05

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Solution

The fourth proportional to 13,721.56, 18,933.67 and 7,751.05 is: 10,695.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.56 : 18,933.67 = 7,751.05 : x
  2. Step 2: Convert to fraction form
    13,721.56/18,933.67 = 7,751.05/x
  3. Step 3: Cross multiply
    13,721.56x = 18,933.67 × 7,751.05
  4. Step 4: Simplify right side
    13,721.56x = 146,755,891.09
  5. Step 5: Solve for x
    x = 146,755,891.09/13,721.56
  6. Step 6: Final answer
    x = 10,695.27

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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.