Home / 31,028.12-42,819.09-18,450.44

Finding the Fourth Proportional to 31,028.12, 42,819.09 and 18,450.44

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Solution

The fourth proportional to 31,028.12, 42,819.09 and 18,450.44 is: 25,461.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,028.12 : 42,819.09 = 18,450.44 : x
  2. Step 2: Convert to fraction form
    31,028.12/42,819.09 = 18,450.44/x
  3. Step 3: Cross multiply
    31,028.12x = 42,819.09 × 18,450.44
  4. Step 4: Simplify right side
    31,028.12x = 790,031,050.90
  5. Step 5: Solve for x
    x = 790,031,050.90/31,028.12
  6. Step 6: Final answer
    x = 25,461.78

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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.