Home / 15,815.54-21,825.39-8,741.91

Finding the Fourth Proportional to 15,815.54, 21,825.39 and 8,741.91

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Solution

The fourth proportional to 15,815.54, 21,825.39 and 8,741.91 is: 12,063.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.54 : 21,825.39 = 8,741.91 : x
  2. Step 2: Convert to fraction form
    15,815.54/21,825.39 = 8,741.91/x
  3. Step 3: Cross multiply
    15,815.54x = 21,825.39 × 8,741.91
  4. Step 4: Simplify right side
    15,815.54x = 190,795,595.09
  5. Step 5: Solve for x
    x = 190,795,595.09/15,815.54
  6. Step 6: Final answer
    x = 12,063.81

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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.