Home / 20,172.13-30,193.49-10,788.68

Finding the Fourth Proportional to 20,172.13, 30,193.49 and 10,788.68

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Solution

The fourth proportional to 20,172.13, 30,193.49 and 10,788.68 is: 16,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.13 : 30,193.49 = 10,788.68 : x
  2. Step 2: Convert to fraction form
    20,172.13/30,193.49 = 10,788.68/x
  3. Step 3: Cross multiply
    20,172.13x = 30,193.49 × 10,788.68
  4. Step 4: Simplify right side
    20,172.13x = 325,748,004.15
  5. Step 5: Solve for x
    x = 325,748,004.15/20,172.13
  6. Step 6: Final answer
    x = 16,148.42

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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.