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Finding the Fourth Proportional to 18,280.31, 25,218.11 and 11,904.59

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Solution

The fourth proportional to 18,280.31, 25,218.11 and 11,904.59 is: 16,422.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,280.31 : 25,218.11 = 11,904.59 : x
  2. Step 2: Convert to fraction form
    18,280.31/25,218.11 = 11,904.59/x
  3. Step 3: Cross multiply
    18,280.31x = 25,218.11 × 11,904.59
  4. Step 4: Simplify right side
    18,280.31x = 300,211,352.93
  5. Step 5: Solve for x
    x = 300,211,352.93/18,280.31
  6. Step 6: Final answer
    x = 16,422.67

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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.