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Finding the Fourth Proportional to 21,993.60, 32,977.08 and 8,650.68

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Solution

The fourth proportional to 21,993.60, 32,977.08 and 8,650.68 is: 12,970.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.60 : 32,977.08 = 8,650.68 : x
  2. Step 2: Convert to fraction form
    21,993.60/32,977.08 = 8,650.68/x
  3. Step 3: Cross multiply
    21,993.60x = 32,977.08 × 8,650.68
  4. Step 4: Simplify right side
    21,993.60x = 285,274,166.41
  5. Step 5: Solve for x
    x = 285,274,166.41/21,993.60
  6. Step 6: Final answer
    x = 12,970.78

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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.