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Finding the Fourth Proportional to 18,122.41, 25,000.41 and 12,820.15

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Solution

The fourth proportional to 18,122.41, 25,000.41 and 12,820.15 is: 17,685.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,122.41 : 25,000.41 = 12,820.15 : x
  2. Step 2: Convert to fraction form
    18,122.41/25,000.41 = 12,820.15/x
  3. Step 3: Cross multiply
    18,122.41x = 25,000.41 × 12,820.15
  4. Step 4: Simplify right side
    18,122.41x = 320,509,006.26
  5. Step 5: Solve for x
    x = 320,509,006.26/18,122.41
  6. Step 6: Final answer
    x = 17,685.78

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1.5x scale

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.