Home / 20,516.07-28,318.92-12,450.09

Finding the Fourth Proportional to 20,516.07, 28,318.92 and 12,450.09

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Solution

The fourth proportional to 20,516.07, 28,318.92 and 12,450.09 is: 17,185.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.07 : 28,318.92 = 12,450.09 : x
  2. Step 2: Convert to fraction form
    20,516.07/28,318.92 = 12,450.09/x
  3. Step 3: Cross multiply
    20,516.07x = 28,318.92 × 12,450.09
  4. Step 4: Simplify right side
    20,516.07x = 352,573,102.70
  5. Step 5: Solve for x
    x = 352,573,102.70/20,516.07
  6. Step 6: Final answer
    x = 17,185.22

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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.