Home / 20,308.12-28,025.31-11,815.27

Finding the Fourth Proportional to 20,308.12, 28,025.31 and 11,815.27

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Solution

The fourth proportional to 20,308.12, 28,025.31 and 11,815.27 is: 16,305.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.12 : 28,025.31 = 11,815.27 : x
  2. Step 2: Convert to fraction form
    20,308.12/28,025.31 = 11,815.27/x
  3. Step 3: Cross multiply
    20,308.12x = 28,025.31 × 11,815.27
  4. Step 4: Simplify right side
    20,308.12x = 331,126,604.48
  5. Step 5: Solve for x
    x = 331,126,604.48/20,308.12
  6. Step 6: Final answer
    x = 16,305.13

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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.