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Finding the Fourth Proportional to 18,491.22, 25,512.30 and 10,938.42

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Solution

The fourth proportional to 18,491.22, 25,512.30 and 10,938.42 is: 15,091.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.22 : 25,512.30 = 10,938.42 : x
  2. Step 2: Convert to fraction form
    18,491.22/25,512.30 = 10,938.42/x
  3. Step 3: Cross multiply
    18,491.22x = 25,512.30 × 10,938.42
  4. Step 4: Simplify right side
    18,491.22x = 279,064,252.57
  5. Step 5: Solve for x
    x = 279,064,252.57/18,491.22
  6. Step 6: Final answer
    x = 15,091.72

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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.