Home / 20,438.82-28,205.30-11,487.83

Finding the Fourth Proportional to 20,438.82, 28,205.30 and 11,487.83

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Solution

The fourth proportional to 20,438.82, 28,205.30 and 11,487.83 is: 15,853.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.82 : 28,205.30 = 11,487.83 : x
  2. Step 2: Convert to fraction form
    20,438.82/28,205.30 = 11,487.83/x
  3. Step 3: Cross multiply
    20,438.82x = 28,205.30 × 11,487.83
  4. Step 4: Simplify right side
    20,438.82x = 324,017,579.19
  5. Step 5: Solve for x
    x = 324,017,579.19/20,438.82
  6. Step 6: Final answer
    x = 15,853.05

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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.