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Finding the Fourth Proportional to 13,479.92, 20,206.02 and 5,157.68

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Solution

The fourth proportional to 13,479.92, 20,206.02 and 5,157.68 is: 7,731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.92 : 20,206.02 = 5,157.68 : x
  2. Step 2: Convert to fraction form
    13,479.92/20,206.02 = 5,157.68/x
  3. Step 3: Cross multiply
    13,479.92x = 20,206.02 × 5,157.68
  4. Step 4: Simplify right side
    13,479.92x = 104,216,185.23
  5. Step 5: Solve for x
    x = 104,216,185.23/13,479.92
  6. Step 6: Final answer
    x = 7,731.22

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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.