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Finding the Fourth Proportional to 18,604.88, 25,674.56 and 10,221.20

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Solution

The fourth proportional to 18,604.88, 25,674.56 and 10,221.20 is: 14,105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.88 : 25,674.56 = 10,221.20 : x
  2. Step 2: Convert to fraction form
    18,604.88/25,674.56 = 10,221.20/x
  3. Step 3: Cross multiply
    18,604.88x = 25,674.56 × 10,221.20
  4. Step 4: Simplify right side
    18,604.88x = 262,424,812.67
  5. Step 5: Solve for x
    x = 262,424,812.67/18,604.88
  6. Step 6: Final answer
    x = 14,105.16

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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.