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Finding the Fourth Proportional to 13,604.60, 18,775.60 and 7,938.92

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Solution

The fourth proportional to 13,604.60, 18,775.60 and 7,938.92 is: 10,956.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.60 : 18,775.60 = 7,938.92 : x
  2. Step 2: Convert to fraction form
    13,604.60/18,775.60 = 7,938.92/x
  3. Step 3: Cross multiply
    13,604.60x = 18,775.60 × 7,938.92
  4. Step 4: Simplify right side
    13,604.60x = 149,057,986.35
  5. Step 5: Solve for x
    x = 149,057,986.35/13,604.60
  6. Step 6: Final answer
    x = 10,956.44

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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.