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Finding the Fourth Proportional to 13,791.88, 19,033.70 and 7,821.48

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Solution

The fourth proportional to 13,791.88, 19,033.70 and 7,821.48 is: 10,794.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.88 : 19,033.70 = 7,821.48 : x
  2. Step 2: Convert to fraction form
    13,791.88/19,033.70 = 7,821.48/x
  3. Step 3: Cross multiply
    13,791.88x = 19,033.70 × 7,821.48
  4. Step 4: Simplify right side
    13,791.88x = 148,871,703.88
  5. Step 5: Solve for x
    x = 148,871,703.88/13,791.88
  6. Step 6: Final answer
    x = 10,794.16

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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.