Home / 18,120.68-27,179.79-4,971.95

Finding the Fourth Proportional to 18,120.68, 27,179.79 and 4,971.95

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Solution

The fourth proportional to 18,120.68, 27,179.79 and 4,971.95 is: 7,457.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.68 : 27,179.79 = 4,971.95 : x
  2. Step 2: Convert to fraction form
    18,120.68/27,179.79 = 4,971.95/x
  3. Step 3: Cross multiply
    18,120.68x = 27,179.79 × 4,971.95
  4. Step 4: Simplify right side
    18,120.68x = 135,136,420.99
  5. Step 5: Solve for x
    x = 135,136,420.99/18,120.68
  6. Step 6: Final answer
    x = 7,457.58

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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.