Home / 20,745.31-28,628.72-11,313.87

Finding the Fourth Proportional to 20,745.31, 28,628.72 and 11,313.87

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Solution

The fourth proportional to 20,745.31, 28,628.72 and 11,313.87 is: 15,613.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.31 : 28,628.72 = 11,313.87 : x
  2. Step 2: Convert to fraction form
    20,745.31/28,628.72 = 11,313.87/x
  3. Step 3: Cross multiply
    20,745.31x = 28,628.72 × 11,313.87
  4. Step 4: Simplify right side
    20,745.31x = 323,901,559.78
  5. Step 5: Solve for x
    x = 323,901,559.78/20,745.31
  6. Step 6: Final answer
    x = 15,613.24

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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.