Home / 20,954.14-31,429.32-12,577.90

Finding the Fourth Proportional to 20,954.14, 31,429.32 and 12,577.90

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Solution

The fourth proportional to 20,954.14, 31,429.32 and 12,577.90 is: 18,865.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.14 : 31,429.32 = 12,577.90 : x
  2. Step 2: Convert to fraction form
    20,954.14/31,429.32 = 12,577.90/x
  3. Step 3: Cross multiply
    20,954.14x = 31,429.32 × 12,577.90
  4. Step 4: Simplify right side
    20,954.14x = 395,314,844.03
  5. Step 5: Solve for x
    x = 395,314,844.03/20,954.14
  6. Step 6: Final answer
    x = 18,865.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.