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Finding the Fourth Proportional to 13,904.88, 19,191 and 7,936.80

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Solution

The fourth proportional to 13,904.88, 19,191 and 7,936.80 is: 10,954.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,904.88 : 19,191 = 7,936.80 : x
  2. Step 2: Convert to fraction form
    13,904.88/19,191 = 7,936.80/x
  3. Step 3: Cross multiply
    13,904.88x = 19,191 × 7,936.80
  4. Step 4: Simplify right side
    13,904.88x = 152,315,128.80
  5. Step 5: Solve for x
    x = 152,315,128.80/13,904.88
  6. Step 6: Final answer
    x = 10,954.08

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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.