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Finding the Fourth Proportional to 12,543.21, 18,791.28 and 6,295.86

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Solution

The fourth proportional to 12,543.21, 18,791.28 and 6,295.86 is: 9,431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.21 : 18,791.28 = 6,295.86 : x
  2. Step 2: Convert to fraction form
    12,543.21/18,791.28 = 6,295.86/x
  3. Step 3: Cross multiply
    12,543.21x = 18,791.28 × 6,295.86
  4. Step 4: Simplify right side
    12,543.21x = 118,307,268.10
  5. Step 5: Solve for x
    x = 118,307,268.10/12,543.21
  6. Step 6: Final answer
    x = 9,431.98

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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.