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Finding the Fourth Proportional to 13,893.80, 19,172.08 and 7,923.89

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Solution

The fourth proportional to 13,893.80, 19,172.08 and 7,923.89 is: 10,934.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,893.80 : 19,172.08 = 7,923.89 : x
  2. Step 2: Convert to fraction form
    13,893.80/19,172.08 = 7,923.89/x
  3. Step 3: Cross multiply
    13,893.80x = 19,172.08 × 7,923.89
  4. Step 4: Simplify right side
    13,893.80x = 151,917,452.99
  5. Step 5: Solve for x
    x = 151,917,452.99/13,893.80
  6. Step 6: Final answer
    x = 10,934.19

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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.