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Finding the Fourth Proportional to 19,879.74, 29,801.05 and 6,722.91

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Solution

The fourth proportional to 19,879.74, 29,801.05 and 6,722.91 is: 10,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.74 : 29,801.05 = 6,722.91 : x
  2. Step 2: Convert to fraction form
    19,879.74/29,801.05 = 6,722.91/x
  3. Step 3: Cross multiply
    19,879.74x = 29,801.05 × 6,722.91
  4. Step 4: Simplify right side
    19,879.74x = 200,349,777.06
  5. Step 5: Solve for x
    x = 200,349,777.06/19,879.74
  6. Step 6: Final answer
    x = 10,078.09

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1.5x scale

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.