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Finding the Fourth Proportional to 8,652.48, 12,978.72 and 2,809.68

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Solution

The fourth proportional to 8,652.48, 12,978.72 and 2,809.68 is: 4,214.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.48 : 12,978.72 = 2,809.68 : x
  2. Step 2: Convert to fraction form
    8,652.48/12,978.72 = 2,809.68/x
  3. Step 3: Cross multiply
    8,652.48x = 12,978.72 × 2,809.68
  4. Step 4: Simplify right side
    8,652.48x = 36,466,050.01
  5. Step 5: Solve for x
    x = 36,466,050.01/8,652.48
  6. Step 6: Final answer
    x = 4,214.52

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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.