Home / 20,791.52-31,194.48-12,991.04

Finding the Fourth Proportional to 20,791.52, 31,194.48 and 12,991.04

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Solution

The fourth proportional to 20,791.52, 31,194.48 and 12,991.04 is: 19,491.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.52 : 31,194.48 = 12,991.04 : x
  2. Step 2: Convert to fraction form
    20,791.52/31,194.48 = 12,991.04/x
  3. Step 3: Cross multiply
    20,791.52x = 31,194.48 × 12,991.04
  4. Step 4: Simplify right side
    20,791.52x = 405,248,737.46
  5. Step 5: Solve for x
    x = 405,248,737.46/20,791.52
  6. Step 6: Final answer
    x = 19,491.06

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1.5x scale

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.