Home / 15,105.23-20,846.52-8,390.73

Finding the Fourth Proportional to 15,105.23, 20,846.52 and 8,390.73

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Solution

The fourth proportional to 15,105.23, 20,846.52 and 8,390.73 is: 11,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.23 : 20,846.52 = 8,390.73 : x
  2. Step 2: Convert to fraction form
    15,105.23/20,846.52 = 8,390.73/x
  3. Step 3: Cross multiply
    15,105.23x = 20,846.52 × 8,390.73
  4. Step 4: Simplify right side
    15,105.23x = 174,917,520.76
  5. Step 5: Solve for x
    x = 174,917,520.76/15,105.23
  6. Step 6: Final answer
    x = 11,579.93

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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.