Home / 15,790.78-21,795.78-9,819.46

Finding the Fourth Proportional to 15,790.78, 21,795.78 and 9,819.46

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Solution

The fourth proportional to 15,790.78, 21,795.78 and 9,819.46 is: 13,553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.78 : 21,795.78 = 9,819.46 : x
  2. Step 2: Convert to fraction form
    15,790.78/21,795.78 = 9,819.46/x
  3. Step 3: Cross multiply
    15,790.78x = 21,795.78 × 9,819.46
  4. Step 4: Simplify right side
    15,790.78x = 214,022,789.88
  5. Step 5: Solve for x
    x = 214,022,789.88/15,790.78
  6. Step 6: Final answer
    x = 13,553.66

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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.