Home / 21,234.84-31,819.05-13,427.25

Finding the Fourth Proportional to 21,234.84, 31,819.05 and 13,427.25

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Solution

The fourth proportional to 21,234.84, 31,819.05 and 13,427.25 is: 20,119.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.84 : 31,819.05 = 13,427.25 : x
  2. Step 2: Convert to fraction form
    21,234.84/31,819.05 = 13,427.25/x
  3. Step 3: Cross multiply
    21,234.84x = 31,819.05 × 13,427.25
  4. Step 4: Simplify right side
    21,234.84x = 427,242,339.11
  5. Step 5: Solve for x
    x = 427,242,339.11/21,234.84
  6. Step 6: Final answer
    x = 20,119.88

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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.