Home / 20,745.24-28,628.34-11,313.78

Finding the Fourth Proportional to 20,745.24, 28,628.34 and 11,313.78

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Solution

The fourth proportional to 20,745.24, 28,628.34 and 11,313.78 is: 15,612.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.24 : 28,628.34 = 11,313.78 : x
  2. Step 2: Convert to fraction form
    20,745.24/28,628.34 = 11,313.78/x
  3. Step 3: Cross multiply
    20,745.24x = 28,628.34 × 11,313.78
  4. Step 4: Simplify right side
    20,745.24x = 323,894,740.53
  5. Step 5: Solve for x
    x = 323,894,740.53/20,745.24
  6. Step 6: Final answer
    x = 15,612.97

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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.