Home / 20,745.56-28,628.70-11,313.92

Finding the Fourth Proportional to 20,745.56, 28,628.70 and 11,313.92

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Solution

The fourth proportional to 20,745.56, 28,628.70 and 11,313.92 is: 15,613.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.56 : 28,628.70 = 11,313.92 : x
  2. Step 2: Convert to fraction form
    20,745.56/28,628.70 = 11,313.92/x
  3. Step 3: Cross multiply
    20,745.56x = 28,628.70 × 11,313.92
  4. Step 4: Simplify right side
    20,745.56x = 323,902,821.50
  5. Step 5: Solve for x
    x = 323,902,821.50/20,745.56
  6. Step 6: Final answer
    x = 15,613.12

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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.