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Finding the Fourth Proportional to 12,588.80, 18,861.60 and 6,000.80

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Solution

The fourth proportional to 12,588.80, 18,861.60 and 6,000.80 is: 8,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,588.80 : 18,861.60 = 6,000.80 : x
  2. Step 2: Convert to fraction form
    12,588.80/18,861.60 = 6,000.80/x
  3. Step 3: Cross multiply
    12,588.80x = 18,861.60 × 6,000.80
  4. Step 4: Simplify right side
    12,588.80x = 113,184,689.28
  5. Step 5: Solve for x
    x = 113,184,689.28/12,588.80
  6. Step 6: Final answer
    x = 8,990.90

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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.