Home / 20,749.07-30,991.29-18,771.65

Finding the Fourth Proportional to 20,749.07, 30,991.29 and 18,771.65

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Solution

The fourth proportional to 20,749.07, 30,991.29 and 18,771.65 is: 28,037.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.07 : 30,991.29 = 18,771.65 : x
  2. Step 2: Convert to fraction form
    20,749.07/30,991.29 = 18,771.65/x
  3. Step 3: Cross multiply
    20,749.07x = 30,991.29 × 18,771.65
  4. Step 4: Simplify right side
    20,749.07x = 581,757,493.97
  5. Step 5: Solve for x
    x = 581,757,493.97/20,749.07
  6. Step 6: Final answer
    x = 28,037.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.