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Finding the Fourth Proportional to 19,874.58, 29,812.02 and 18,718.80

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Solution

The fourth proportional to 19,874.58, 29,812.02 and 18,718.80 is: 28,078.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,874.58 : 29,812.02 = 18,718.80 : x
  2. Step 2: Convert to fraction form
    19,874.58/29,812.02 = 18,718.80/x
  3. Step 3: Cross multiply
    19,874.58x = 29,812.02 × 18,718.80
  4. Step 4: Simplify right side
    19,874.58x = 558,045,239.98
  5. Step 5: Solve for x
    x = 558,045,239.98/19,874.58
  6. Step 6: Final answer
    x = 28,078.34

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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.