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Finding the Fourth Proportional to 8,699.68, 13,045.20 and 3,152.80

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Solution

The fourth proportional to 8,699.68, 13,045.20 and 3,152.80 is: 4,727.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.68 : 13,045.20 = 3,152.80 : x
  2. Step 2: Convert to fraction form
    8,699.68/13,045.20 = 3,152.80/x
  3. Step 3: Cross multiply
    8,699.68x = 13,045.20 × 3,152.80
  4. Step 4: Simplify right side
    8,699.68x = 41,128,906.56
  5. Step 5: Solve for x
    x = 41,128,906.56/8,699.68
  6. Step 6: Final answer
    x = 4,727.63

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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.