Home / 15,811.37-21,819.99-8,641.73

Finding the Fourth Proportional to 15,811.37, 21,819.99 and 8,641.73

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Solution

The fourth proportional to 15,811.37, 21,819.99 and 8,641.73 is: 11,925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.37 : 21,819.99 = 8,641.73 : x
  2. Step 2: Convert to fraction form
    15,811.37/21,819.99 = 8,641.73/x
  3. Step 3: Cross multiply
    15,811.37x = 21,819.99 × 8,641.73
  4. Step 4: Simplify right side
    15,811.37x = 188,562,353.08
  5. Step 5: Solve for x
    x = 188,562,353.08/15,811.37
  6. Step 6: Final answer
    x = 11,925.75

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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.