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Finding the Fourth Proportional to 12,660.50, 18,991.02 and 4,340.48

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Solution

The fourth proportional to 12,660.50, 18,991.02 and 4,340.48 is: 6,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.50 : 18,991.02 = 4,340.48 : x
  2. Step 2: Convert to fraction form
    12,660.50/18,991.02 = 4,340.48/x
  3. Step 3: Cross multiply
    12,660.50x = 18,991.02 × 4,340.48
  4. Step 4: Simplify right side
    12,660.50x = 82,430,142.49
  5. Step 5: Solve for x
    x = 82,430,142.49/12,660.50
  6. Step 6: Final answer
    x = 6,510.81

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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.