Home / 18,721.36-25,796.10-12,742.48

Finding the Fourth Proportional to 18,721.36, 25,796.10 and 12,742.48

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Solution

The fourth proportional to 18,721.36, 25,796.10 and 12,742.48 is: 17,557.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.36 : 25,796.10 = 12,742.48 : x
  2. Step 2: Convert to fraction form
    18,721.36/25,796.10 = 12,742.48/x
  3. Step 3: Cross multiply
    18,721.36x = 25,796.10 × 12,742.48
  4. Step 4: Simplify right side
    18,721.36x = 328,706,288.33
  5. Step 5: Solve for x
    x = 328,706,288.33/18,721.36
  6. Step 6: Final answer
    x = 17,557.82

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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.