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Finding the Fourth Proportional to 18,491.54, 25,516.35 and 10,938.15

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Solution

The fourth proportional to 18,491.54, 25,516.35 and 10,938.15 is: 15,093.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.54 : 25,516.35 = 10,938.15 : x
  2. Step 2: Convert to fraction form
    18,491.54/25,516.35 = 10,938.15/x
  3. Step 3: Cross multiply
    18,491.54x = 25,516.35 × 10,938.15
  4. Step 4: Simplify right side
    18,491.54x = 279,101,663.75
  5. Step 5: Solve for x
    x = 279,101,663.75/18,491.54
  6. Step 6: Final answer
    x = 15,093.48

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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.