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Finding the Fourth Proportional to 19,639.68, 29,440.68 and 12,600

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Solution

The fourth proportional to 19,639.68, 29,440.68 and 12,600 is: 18,887.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.68 : 29,440.68 = 12,600 : x
  2. Step 2: Convert to fraction form
    19,639.68/29,440.68 = 12,600/x
  3. Step 3: Cross multiply
    19,639.68x = 29,440.68 × 12,600
  4. Step 4: Simplify right side
    19,639.68x = 370,952,568
  5. Step 5: Solve for x
    x = 370,952,568/19,639.68
  6. Step 6: Final answer
    x = 18,887.91

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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.