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Finding the Fourth Proportional to 18,604.57, 25,645.86 and 11,421.22

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Solution

The fourth proportional to 18,604.57, 25,645.86 and 11,421.22 is: 15,743.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.57 : 25,645.86 = 11,421.22 : x
  2. Step 2: Convert to fraction form
    18,604.57/25,645.86 = 11,421.22/x
  3. Step 3: Cross multiply
    18,604.57x = 25,645.86 × 11,421.22
  4. Step 4: Simplify right side
    18,604.57x = 292,907,009.15
  5. Step 5: Solve for x
    x = 292,907,009.15/18,604.57
  6. Step 6: Final answer
    x = 15,743.82

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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.