Home / 20,635.31-28,478.49-11,684.39

Finding the Fourth Proportional to 20,635.31, 28,478.49 and 11,684.39

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Solution

The fourth proportional to 20,635.31, 28,478.49 and 11,684.39 is: 16,125.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.31 : 28,478.49 = 11,684.39 : x
  2. Step 2: Convert to fraction form
    20,635.31/28,478.49 = 11,684.39/x
  3. Step 3: Cross multiply
    20,635.31x = 28,478.49 × 11,684.39
  4. Step 4: Simplify right side
    20,635.31x = 332,753,783.77
  5. Step 5: Solve for x
    x = 332,753,783.77/20,635.31
  6. Step 6: Final answer
    x = 16,125.46

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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.