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Finding the Fourth Proportional to 14,797.20, 20,419.08 and 8,081.40

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Solution

The fourth proportional to 14,797.20, 20,419.08 and 8,081.40 is: 11,151.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,797.20 : 20,419.08 = 8,081.40 : x
  2. Step 2: Convert to fraction form
    14,797.20/20,419.08 = 8,081.40/x
  3. Step 3: Cross multiply
    14,797.20x = 20,419.08 × 8,081.40
  4. Step 4: Simplify right side
    14,797.20x = 165,014,799.38
  5. Step 5: Solve for x
    x = 165,014,799.38/14,797.20
  6. Step 6: Final answer
    x = 11,151.76

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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.