Home / 22,421.78-30,940.86-12,861.16

Finding the Fourth Proportional to 22,421.78, 30,940.86 and 12,861.16

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Solution

The fourth proportional to 22,421.78, 30,940.86 and 12,861.16 is: 17,747.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,421.78 : 30,940.86 = 12,861.16 : x
  2. Step 2: Convert to fraction form
    22,421.78/30,940.86 = 12,861.16/x
  3. Step 3: Cross multiply
    22,421.78x = 30,940.86 × 12,861.16
  4. Step 4: Simplify right side
    22,421.78x = 397,935,351.00
  5. Step 5: Solve for x
    x = 397,935,351.00/22,421.78
  6. Step 6: Final answer
    x = 17,747.71

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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.