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Finding the Fourth Proportional to 20,045.04, 27,663 and 12,390

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Solution

The fourth proportional to 20,045.04, 27,663 and 12,390 is: 17,098.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,045.04 : 27,663 = 12,390 : x
  2. Step 2: Convert to fraction form
    20,045.04/27,663 = 12,390/x
  3. Step 3: Cross multiply
    20,045.04x = 27,663 × 12,390
  4. Step 4: Simplify right side
    20,045.04x = 342,744,570
  5. Step 5: Solve for x
    x = 342,744,570/20,045.04
  6. Step 6: Final answer
    x = 17,098.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.