Home / 20,631.57-28,472.22-11,678.91

Finding the Fourth Proportional to 20,631.57, 28,472.22 and 11,678.91

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Solution

The fourth proportional to 20,631.57, 28,472.22 and 11,678.91 is: 16,117.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.57 : 28,472.22 = 11,678.91 : x
  2. Step 2: Convert to fraction form
    20,631.57/28,472.22 = 11,678.91/x
  3. Step 3: Cross multiply
    20,631.57x = 28,472.22 × 11,678.91
  4. Step 4: Simplify right side
    20,631.57x = 332,524,494.88
  5. Step 5: Solve for x
    x = 332,524,494.88/20,631.57
  6. Step 6: Final answer
    x = 16,117.27

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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.