Home / 21,864.80-30,177.91-13,905.49

Finding the Fourth Proportional to 21,864.80, 30,177.91 and 13,905.49

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Solution

The fourth proportional to 21,864.80, 30,177.91 and 13,905.49 is: 19,192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.80 : 30,177.91 = 13,905.49 : x
  2. Step 2: Convert to fraction form
    21,864.80/30,177.91 = 13,905.49/x
  3. Step 3: Cross multiply
    21,864.80x = 30,177.91 × 13,905.49
  4. Step 4: Simplify right side
    21,864.80x = 419,638,625.73
  5. Step 5: Solve for x
    x = 419,638,625.73/21,864.80
  6. Step 6: Final answer
    x = 19,192.43

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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.