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Finding the Fourth Proportional to 16,660.50, 24,895.25 and 12,689.70

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Solution

The fourth proportional to 16,660.50, 24,895.25 and 12,689.70 is: 18,961.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,660.50 : 24,895.25 = 12,689.70 : x
  2. Step 2: Convert to fraction form
    16,660.50/24,895.25 = 12,689.70/x
  3. Step 3: Cross multiply
    16,660.50x = 24,895.25 × 12,689.70
  4. Step 4: Simplify right side
    16,660.50x = 315,913,190.48
  5. Step 5: Solve for x
    x = 315,913,190.48/16,660.50
  6. Step 6: Final answer
    x = 18,961.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.