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Finding the Fourth Proportional to 19,163.90, 28,748.74 and 9,798.86

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Solution

The fourth proportional to 19,163.90, 28,748.74 and 9,798.86 is: 14,699.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.90 : 28,748.74 = 9,798.86 : x
  2. Step 2: Convert to fraction form
    19,163.90/28,748.74 = 9,798.86/x
  3. Step 3: Cross multiply
    19,163.90x = 28,748.74 × 9,798.86
  4. Step 4: Simplify right side
    19,163.90x = 281,704,878.44
  5. Step 5: Solve for x
    x = 281,704,878.44/19,163.90
  6. Step 6: Final answer
    x = 14,699.77

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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.