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Finding the Fourth Proportional to 13,394.76, 18,477.90 and 8,680.56

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Solution

The fourth proportional to 13,394.76, 18,477.90 and 8,680.56 is: 11,974.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,394.76 : 18,477.90 = 8,680.56 : x
  2. Step 2: Convert to fraction form
    13,394.76/18,477.90 = 8,680.56/x
  3. Step 3: Cross multiply
    13,394.76x = 18,477.90 × 8,680.56
  4. Step 4: Simplify right side
    13,394.76x = 160,398,519.62
  5. Step 5: Solve for x
    x = 160,398,519.62/13,394.76
  6. Step 6: Final answer
    x = 11,974.72

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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.