Home / 15,815.45-21,825.62-8,741.72

Finding the Fourth Proportional to 15,815.45, 21,825.62 and 8,741.72

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Solution

The fourth proportional to 15,815.45, 21,825.62 and 8,741.72 is: 12,063.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.45 : 21,825.62 = 8,741.72 : x
  2. Step 2: Convert to fraction form
    15,815.45/21,825.62 = 8,741.72/x
  3. Step 3: Cross multiply
    15,815.45x = 21,825.62 × 8,741.72
  4. Step 4: Simplify right side
    15,815.45x = 190,793,306.03
  5. Step 5: Solve for x
    x = 190,793,306.03/15,815.45
  6. Step 6: Final answer
    x = 12,063.73

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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.