Home / 13,720.26-18,934.34-7,751.81

Finding the Fourth Proportional to 13,720.26, 18,934.34 and 7,751.81

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Solution

The fourth proportional to 13,720.26, 18,934.34 and 7,751.81 is: 10,697.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.26 : 18,934.34 = 7,751.81 : x
  2. Step 2: Convert to fraction form
    13,720.26/18,934.34 = 7,751.81/x
  3. Step 3: Cross multiply
    13,720.26x = 18,934.34 × 7,751.81
  4. Step 4: Simplify right side
    13,720.26x = 146,775,406.16
  5. Step 5: Solve for x
    x = 146,775,406.16/13,720.26
  6. Step 6: Final answer
    x = 10,697.71

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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.