Home / 20,577.58-28,396.82-12,078.20

Finding the Fourth Proportional to 20,577.58, 28,396.82 and 12,078.20

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Solution

The fourth proportional to 20,577.58, 28,396.82 and 12,078.20 is: 16,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.58 : 28,396.82 = 12,078.20 : x
  2. Step 2: Convert to fraction form
    20,577.58/28,396.82 = 12,078.20/x
  3. Step 3: Cross multiply
    20,577.58x = 28,396.82 × 12,078.20
  4. Step 4: Simplify right side
    20,577.58x = 342,982,471.32
  5. Step 5: Solve for x
    x = 342,982,471.32/20,577.58
  6. Step 6: Final answer
    x = 16,667.77

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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.