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Finding the Fourth Proportional to 12,124.80, 18,235.80 and 10,861.20

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Solution

The fourth proportional to 12,124.80, 18,235.80 and 10,861.20 is: 16,335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,124.80 : 18,235.80 = 10,861.20 : x
  2. Step 2: Convert to fraction form
    12,124.80/18,235.80 = 10,861.20/x
  3. Step 3: Cross multiply
    12,124.80x = 18,235.80 × 10,861.20
  4. Step 4: Simplify right side
    12,124.80x = 198,062,670.96
  5. Step 5: Solve for x
    x = 198,062,670.96/12,124.80
  6. Step 6: Final answer
    x = 16,335.34

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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.