Home / 20,947.16-31,415.94-12,516.04

Finding the Fourth Proportional to 20,947.16, 31,415.94 and 12,516.04

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Solution

The fourth proportional to 20,947.16, 31,415.94 and 12,516.04 is: 18,771.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.16 : 31,415.94 = 12,516.04 : x
  2. Step 2: Convert to fraction form
    20,947.16/31,415.94 = 12,516.04/x
  3. Step 3: Cross multiply
    20,947.16x = 31,415.94 × 12,516.04
  4. Step 4: Simplify right side
    20,947.16x = 393,203,161.68
  5. Step 5: Solve for x
    x = 393,203,161.68/20,947.16
  6. Step 6: Final answer
    x = 18,771.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.