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Finding the Fourth Proportional to 18,225, 25,140.78 and 12,246.39

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Solution

The fourth proportional to 18,225, 25,140.78 and 12,246.39 is: 16,893.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,225 : 25,140.78 = 12,246.39 : x
  2. Step 2: Convert to fraction form
    18,225/25,140.78 = 12,246.39/x
  3. Step 3: Cross multiply
    18,225x = 25,140.78 × 12,246.39
  4. Step 4: Simplify right side
    18,225x = 307,883,796.78
  5. Step 5: Solve for x
    x = 307,883,796.78/18,225
  6. Step 6: Final answer
    x = 16,893.49

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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.