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Finding the Fourth Proportional to 13,489.65, 18,614.84 and 7,520.96

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Solution

The fourth proportional to 13,489.65, 18,614.84 and 7,520.96 is: 10,378.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.65 : 18,614.84 = 7,520.96 : x
  2. Step 2: Convert to fraction form
    13,489.65/18,614.84 = 7,520.96/x
  3. Step 3: Cross multiply
    13,489.65x = 18,614.84 × 7,520.96
  4. Step 4: Simplify right side
    13,489.65x = 140,001,532.39
  5. Step 5: Solve for x
    x = 140,001,532.39/13,489.65
  6. Step 6: Final answer
    x = 10,378.44

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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.