Home / 20,709.23-28,579.08-11,757

Finding the Fourth Proportional to 20,709.23, 28,579.08 and 11,757

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Solution

The fourth proportional to 20,709.23, 28,579.08 and 11,757 is: 16,224.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.23 : 28,579.08 = 11,757 : x
  2. Step 2: Convert to fraction form
    20,709.23/28,579.08 = 11,757/x
  3. Step 3: Cross multiply
    20,709.23x = 28,579.08 × 11,757
  4. Step 4: Simplify right side
    20,709.23x = 336,004,243.56
  5. Step 5: Solve for x
    x = 336,004,243.56/20,709.23
  6. Step 6: Final answer
    x = 16,224.85

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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.