Home / 20,142.06-30,187.50-11,381.88

Finding the Fourth Proportional to 20,142.06, 30,187.50 and 11,381.88

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Solution

The fourth proportional to 20,142.06, 30,187.50 and 11,381.88 is: 17,058.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.06 : 30,187.50 = 11,381.88 : x
  2. Step 2: Convert to fraction form
    20,142.06/30,187.50 = 11,381.88/x
  3. Step 3: Cross multiply
    20,142.06x = 30,187.50 × 11,381.88
  4. Step 4: Simplify right side
    20,142.06x = 343,590,502.50
  5. Step 5: Solve for x
    x = 343,590,502.50/20,142.06
  6. Step 6: Final answer
    x = 17,058.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.