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Finding the Fourth Proportional to 20,134.65, 30,201.98 and 16,878.45

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Solution

The fourth proportional to 20,134.65, 30,201.98 and 16,878.45 is: 25,317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.65 : 30,201.98 = 16,878.45 : x
  2. Step 2: Convert to fraction form
    20,134.65/30,201.98 = 16,878.45/x
  3. Step 3: Cross multiply
    20,134.65x = 30,201.98 × 16,878.45
  4. Step 4: Simplify right side
    20,134.65x = 509,762,524.94
  5. Step 5: Solve for x
    x = 509,762,524.94/20,134.65
  6. Step 6: Final answer
    x = 25,317.68

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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.