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Finding the Fourth Proportional to 20,658.92, 28,506.99 and 11,704.51

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Solution

The fourth proportional to 20,658.92, 28,506.99 and 11,704.51 is: 16,150.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.92 : 28,506.99 = 11,704.51 : x
  2. Step 2: Convert to fraction form
    20,658.92/28,506.99 = 11,704.51/x
  3. Step 3: Cross multiply
    20,658.92x = 28,506.99 × 11,704.51
  4. Step 4: Simplify right side
    20,658.92x = 333,660,349.52
  5. Step 5: Solve for x
    x = 333,660,349.52/20,658.92
  6. Step 6: Final answer
    x = 16,150.91

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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.