Home / 20,516.51-30,768.68-5,721.86

Finding the Fourth Proportional to 20,516.51, 30,768.68 and 5,721.86

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Solution

The fourth proportional to 20,516.51, 30,768.68 and 5,721.86 is: 8,581.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.51 : 30,768.68 = 5,721.86 : x
  2. Step 2: Convert to fraction form
    20,516.51/30,768.68 = 5,721.86/x
  3. Step 3: Cross multiply
    20,516.51x = 30,768.68 × 5,721.86
  4. Step 4: Simplify right side
    20,516.51x = 176,053,939.81
  5. Step 5: Solve for x
    x = 176,053,939.81/20,516.51
  6. Step 6: Final answer
    x = 8,581.09

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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.