Home / 18,721.79-28,090.33-12,061.77

Finding the Fourth Proportional to 18,721.79, 28,090.33 and 12,061.77

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Solution

The fourth proportional to 18,721.79, 28,090.33 and 12,061.77 is: 18,097.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.79 : 28,090.33 = 12,061.77 : x
  2. Step 2: Convert to fraction form
    18,721.79/28,090.33 = 12,061.77/x
  3. Step 3: Cross multiply
    18,721.79x = 28,090.33 × 12,061.77
  4. Step 4: Simplify right side
    18,721.79x = 338,819,099.68
  5. Step 5: Solve for x
    x = 338,819,099.68/18,721.79
  6. Step 6: Final answer
    x = 18,097.58

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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.