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Finding the Fourth Proportional to 13,842.16, 20,753.18 and 5,519.68

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Solution

The fourth proportional to 13,842.16, 20,753.18 and 5,519.68 is: 8,275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,842.16 : 20,753.18 = 5,519.68 : x
  2. Step 2: Convert to fraction form
    13,842.16/20,753.18 = 5,519.68/x
  3. Step 3: Cross multiply
    13,842.16x = 20,753.18 × 5,519.68
  4. Step 4: Simplify right side
    13,842.16x = 114,550,912.58
  5. Step 5: Solve for x
    x = 114,550,912.58/13,842.16
  6. Step 6: Final answer
    x = 8,275.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.