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Finding the Fourth Proportional to 13,661.25, 20,479.51 and 4,894.21

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Solution

The fourth proportional to 13,661.25, 20,479.51 and 4,894.21 is: 7,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.25 : 20,479.51 = 4,894.21 : x
  2. Step 2: Convert to fraction form
    13,661.25/20,479.51 = 4,894.21/x
  3. Step 3: Cross multiply
    13,661.25x = 20,479.51 × 4,894.21
  4. Step 4: Simplify right side
    13,661.25x = 100,231,022.64
  5. Step 5: Solve for x
    x = 100,231,022.64/13,661.25
  6. Step 6: Final answer
    x = 7,336.89

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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.