Home / 13,536.34-20,394.78-12,221.57

Finding the Fourth Proportional to 13,536.34, 20,394.78 and 12,221.57

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Solution

The fourth proportional to 13,536.34, 20,394.78 and 12,221.57 is: 18,413.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,536.34 : 20,394.78 = 12,221.57 : x
  2. Step 2: Convert to fraction form
    13,536.34/20,394.78 = 12,221.57/x
  3. Step 3: Cross multiply
    13,536.34x = 20,394.78 × 12,221.57
  4. Step 4: Simplify right side
    13,536.34x = 249,256,236.56
  5. Step 5: Solve for x
    x = 249,256,236.56/13,536.34
  6. Step 6: Final answer
    x = 18,413.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.