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Finding the Fourth Proportional to 14,808.40, 20,410.12 and 13,400.40

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Solution

The fourth proportional to 14,808.40, 20,410.12 and 13,400.40 is: 18,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,808.40 : 20,410.12 = 13,400.40 : x
  2. Step 2: Convert to fraction form
    14,808.40/20,410.12 = 13,400.40/x
  3. Step 3: Cross multiply
    14,808.40x = 20,410.12 × 13,400.40
  4. Step 4: Simplify right side
    14,808.40x = 273,503,772.05
  5. Step 5: Solve for x
    x = 273,503,772.05/14,808.40
  6. Step 6: Final answer
    x = 18,469.50

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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.