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Finding the Fourth Proportional to 12,669.60, 18,993.60 and 8,960.16

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Solution

The fourth proportional to 12,669.60, 18,993.60 and 8,960.16 is: 13,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.60 : 18,993.60 = 8,960.16 : x
  2. Step 2: Convert to fraction form
    12,669.60/18,993.60 = 8,960.16/x
  3. Step 3: Cross multiply
    12,669.60x = 18,993.60 × 8,960.16
  4. Step 4: Simplify right side
    12,669.60x = 170,185,694.98
  5. Step 5: Solve for x
    x = 170,185,694.98/12,669.60
  6. Step 6: Final answer
    x = 13,432.60

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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.