Home / 21,213.27-31,819.60-7,170.30

Finding the Fourth Proportional to 21,213.27, 31,819.60 and 7,170.30

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Solution

The fourth proportional to 21,213.27, 31,819.60 and 7,170.30 is: 10,755.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.27 : 31,819.60 = 7,170.30 : x
  2. Step 2: Convert to fraction form
    21,213.27/31,819.60 = 7,170.30/x
  3. Step 3: Cross multiply
    21,213.27x = 31,819.60 × 7,170.30
  4. Step 4: Simplify right side
    21,213.27x = 228,156,077.88
  5. Step 5: Solve for x
    x = 228,156,077.88/21,213.27
  6. Step 6: Final answer
    x = 10,755.35

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1.5x scale

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.