Home / 31,447.85-43,384.82-20,819.03

Finding the Fourth Proportional to 31,447.85, 43,384.82 and 20,819.03

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Solution

The fourth proportional to 31,447.85, 43,384.82 and 20,819.03 is: 28,721.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,447.85 : 43,384.82 = 20,819.03 : x
  2. Step 2: Convert to fraction form
    31,447.85/43,384.82 = 20,819.03/x
  3. Step 3: Cross multiply
    31,447.85x = 43,384.82 × 20,819.03
  4. Step 4: Simplify right side
    31,447.85x = 903,229,548.11
  5. Step 5: Solve for x
    x = 903,229,548.11/31,447.85
  6. Step 6: Final answer
    x = 28,721.51

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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.