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Finding the Fourth Proportional to 8,672.15, 12,997.80 and 4,976.93

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Solution

The fourth proportional to 8,672.15, 12,997.80 and 4,976.93 is: 7,459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.15 : 12,997.80 = 4,976.93 : x
  2. Step 2: Convert to fraction form
    8,672.15/12,997.80 = 4,976.93/x
  3. Step 3: Cross multiply
    8,672.15x = 12,997.80 × 4,976.93
  4. Step 4: Simplify right side
    8,672.15x = 64,689,140.75
  5. Step 5: Solve for x
    x = 64,689,140.75/8,672.15
  6. Step 6: Final answer
    x = 7,459.41

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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.