Home / 20,455.54-28,228.47-11,502.85

Finding the Fourth Proportional to 20,455.54, 28,228.47 and 11,502.85

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Solution

The fourth proportional to 20,455.54, 28,228.47 and 11,502.85 is: 15,873.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.54 : 28,228.47 = 11,502.85 : x
  2. Step 2: Convert to fraction form
    20,455.54/28,228.47 = 11,502.85/x
  3. Step 3: Cross multiply
    20,455.54x = 28,228.47 × 11,502.85
  4. Step 4: Simplify right side
    20,455.54x = 324,707,785.57
  5. Step 5: Solve for x
    x = 324,707,785.57/20,455.54
  6. Step 6: Final answer
    x = 15,873.83

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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.