Home / 20,819.62-31,207.56-7,663.60

Finding the Fourth Proportional to 20,819.62, 31,207.56 and 7,663.60

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Solution

The fourth proportional to 20,819.62, 31,207.56 and 7,663.60 is: 11,487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.62 : 31,207.56 = 7,663.60 : x
  2. Step 2: Convert to fraction form
    20,819.62/31,207.56 = 7,663.60/x
  3. Step 3: Cross multiply
    20,819.62x = 31,207.56 × 7,663.60
  4. Step 4: Simplify right side
    20,819.62x = 239,162,256.82
  5. Step 5: Solve for x
    x = 239,162,256.82/20,819.62
  6. Step 6: Final answer
    x = 11,487.35

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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.