Home / 18,717.18-25,828.65-11,172.03

Finding the Fourth Proportional to 18,717.18, 25,828.65 and 11,172.03

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Solution

The fourth proportional to 18,717.18, 25,828.65 and 11,172.03 is: 15,416.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.18 : 25,828.65 = 11,172.03 : x
  2. Step 2: Convert to fraction form
    18,717.18/25,828.65 = 11,172.03/x
  3. Step 3: Cross multiply
    18,717.18x = 25,828.65 × 11,172.03
  4. Step 4: Simplify right side
    18,717.18x = 288,558,452.66
  5. Step 5: Solve for x
    x = 288,558,452.66/18,717.18
  6. Step 6: Final answer
    x = 15,416.77

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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.