Home / 20,663.82-28,516.19-12,166.31

Finding the Fourth Proportional to 20,663.82, 28,516.19 and 12,166.31

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Solution

The fourth proportional to 20,663.82, 28,516.19 and 12,166.31 is: 16,789.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.82 : 28,516.19 = 12,166.31 : x
  2. Step 2: Convert to fraction form
    20,663.82/28,516.19 = 12,166.31/x
  3. Step 3: Cross multiply
    20,663.82x = 28,516.19 × 12,166.31
  4. Step 4: Simplify right side
    20,663.82x = 346,936,818.02
  5. Step 5: Solve for x
    x = 346,936,818.02/20,663.82
  6. Step 6: Final answer
    x = 16,789.58

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1.5x scale

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.