Home / 20,271.38-27,979.17-11,890.58

Finding the Fourth Proportional to 20,271.38, 27,979.17 and 11,890.58

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Solution

The fourth proportional to 20,271.38, 27,979.17 and 11,890.58 is: 16,411.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.38 : 27,979.17 = 11,890.58 : x
  2. Step 2: Convert to fraction form
    20,271.38/27,979.17 = 11,890.58/x
  3. Step 3: Cross multiply
    20,271.38x = 27,979.17 × 11,890.58
  4. Step 4: Simplify right side
    20,271.38x = 332,688,559.22
  5. Step 5: Solve for x
    x = 332,688,559.22/20,271.38
  6. Step 6: Final answer
    x = 16,411.74

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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.