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Finding the Fourth Proportional to 18,684.56, 25,770.10 and 11,970.81

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Solution

The fourth proportional to 18,684.56, 25,770.10 and 11,970.81 is: 16,510.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684.56 : 25,770.10 = 11,970.81 : x
  2. Step 2: Convert to fraction form
    18,684.56/25,770.10 = 11,970.81/x
  3. Step 3: Cross multiply
    18,684.56x = 25,770.10 × 11,970.81
  4. Step 4: Simplify right side
    18,684.56x = 308,488,841.93
  5. Step 5: Solve for x
    x = 308,488,841.93/18,684.56
  6. Step 6: Final answer
    x = 16,510.37

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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.