Home / 39,786.11-54,905.20-21,637.00

Finding the Fourth Proportional to 39,786.11, 54,905.20 and 21,637.00

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Solution

The fourth proportional to 39,786.11, 54,905.20 and 21,637.00 is: 29,859.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.11 : 54,905.20 = 21,637.00 : x
  2. Step 2: Convert to fraction form
    39,786.11/54,905.20 = 21,637.00/x
  3. Step 3: Cross multiply
    39,786.11x = 54,905.20 × 21,637.00
  4. Step 4: Simplify right side
    39,786.11x = 1,187,983,784.12
  5. Step 5: Solve for x
    x = 1,187,983,784.12/39,786.11
  6. Step 6: Final answer
    x = 29,859.26

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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.