Home / 13,818.21-20,731.41-6,427.05

Finding the Fourth Proportional to 13,818.21, 20,731.41 and 6,427.05

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Solution

The fourth proportional to 13,818.21, 20,731.41 and 6,427.05 is: 9,642.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.21 : 20,731.41 = 6,427.05 : x
  2. Step 2: Convert to fraction form
    13,818.21/20,731.41 = 6,427.05/x
  3. Step 3: Cross multiply
    13,818.21x = 20,731.41 × 6,427.05
  4. Step 4: Simplify right side
    13,818.21x = 133,241,808.64
  5. Step 5: Solve for x
    x = 133,241,808.64/13,818.21
  6. Step 6: Final answer
    x = 9,642.48

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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.