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Finding the Fourth Proportional to 19,975.78, 29,963.79 and 8,879.86

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Solution

The fourth proportional to 19,975.78, 29,963.79 and 8,879.86 is: 13,319.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,975.78 : 29,963.79 = 8,879.86 : x
  2. Step 2: Convert to fraction form
    19,975.78/29,963.79 = 8,879.86/x
  3. Step 3: Cross multiply
    19,975.78x = 29,963.79 × 8,879.86
  4. Step 4: Simplify right side
    19,975.78x = 266,074,260.27
  5. Step 5: Solve for x
    x = 266,074,260.27/19,975.78
  6. Step 6: Final answer
    x = 13,319.84

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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.