Home / 13,631.40-20,438.37-6,512.72

Finding the Fourth Proportional to 13,631.40, 20,438.37 and 6,512.72

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Solution

The fourth proportional to 13,631.40, 20,438.37 and 6,512.72 is: 9,764.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.40 : 20,438.37 = 6,512.72 : x
  2. Step 2: Convert to fraction form
    13,631.40/20,438.37 = 6,512.72/x
  3. Step 3: Cross multiply
    13,631.40x = 20,438.37 × 6,512.72
  4. Step 4: Simplify right side
    13,631.40x = 133,109,278.87
  5. Step 5: Solve for x
    x = 133,109,278.87/13,631.40
  6. Step 6: Final answer
    x = 9,764.90

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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.