Home / 21,213.28-31,819.92-5,630.50

Finding the Fourth Proportional to 21,213.28, 31,819.92 and 5,630.50

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Solution

The fourth proportional to 21,213.28, 31,819.92 and 5,630.50 is: 8,445.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.28 : 31,819.92 = 5,630.50 : x
  2. Step 2: Convert to fraction form
    21,213.28/31,819.92 = 5,630.50/x
  3. Step 3: Cross multiply
    21,213.28x = 31,819.92 × 5,630.50
  4. Step 4: Simplify right side
    21,213.28x = 179,162,059.56
  5. Step 5: Solve for x
    x = 179,162,059.56/21,213.28
  6. Step 6: Final answer
    x = 8,445.75

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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.