Home / 20,866.21-28,789.76-11,911.93

Finding the Fourth Proportional to 20,866.21, 28,789.76 and 11,911.93

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Solution

The fourth proportional to 20,866.21, 28,789.76 and 11,911.93 is: 16,435.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.21 : 28,789.76 = 11,911.93 : x
  2. Step 2: Convert to fraction form
    20,866.21/28,789.76 = 11,911.93/x
  3. Step 3: Cross multiply
    20,866.21x = 28,789.76 × 11,911.93
  4. Step 4: Simplify right side
    20,866.21x = 342,941,563.64
  5. Step 5: Solve for x
    x = 342,941,563.64/20,866.21
  6. Step 6: Final answer
    x = 16,435.26

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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.