Home / 20,745.42-28,628.64-11,313.96

Finding the Fourth Proportional to 20,745.42, 28,628.64 and 11,313.96

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Solution

The fourth proportional to 20,745.42, 28,628.64 and 11,313.96 is: 15,613.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.42 : 28,628.64 = 11,313.96 : x
  2. Step 2: Convert to fraction form
    20,745.42/28,628.64 = 11,313.96/x
  3. Step 3: Cross multiply
    20,745.42x = 28,628.64 × 11,313.96
  4. Step 4: Simplify right side
    20,745.42x = 323,903,287.81
  5. Step 5: Solve for x
    x = 323,903,287.81/20,745.42
  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.