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Finding the Fourth Proportional to 14,919.11, 20,588.90 and 8,205.25

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Solution

The fourth proportional to 14,919.11, 20,588.90 and 8,205.25 is: 11,323.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,919.11 : 20,588.90 = 8,205.25 : x
  2. Step 2: Convert to fraction form
    14,919.11/20,588.90 = 8,205.25/x
  3. Step 3: Cross multiply
    14,919.11x = 20,588.90 × 8,205.25
  4. Step 4: Simplify right side
    14,919.11x = 168,937,071.73
  5. Step 5: Solve for x
    x = 168,937,071.73/14,919.11
  6. Step 6: Final answer
    x = 11,323.54

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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.