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Finding the Fourth Proportional to 13,685.52, 20,516.08 and 5,371.48

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Solution

The fourth proportional to 13,685.52, 20,516.08 and 5,371.48 is: 8,052.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.52 : 20,516.08 = 5,371.48 : x
  2. Step 2: Convert to fraction form
    13,685.52/20,516.08 = 5,371.48/x
  3. Step 3: Cross multiply
    13,685.52x = 20,516.08 × 5,371.48
  4. Step 4: Simplify right side
    13,685.52x = 110,201,713.40
  5. Step 5: Solve for x
    x = 110,201,713.40/13,685.52
  6. Step 6: Final answer
    x = 8,052.43

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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.