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Finding the Fourth Proportional to 13,829.20, 20,695.20 and 9,455.20

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Solution

The fourth proportional to 13,829.20, 20,695.20 and 9,455.20 is: 14,149.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,829.20 : 20,695.20 = 9,455.20 : x
  2. Step 2: Convert to fraction form
    13,829.20/20,695.20 = 9,455.20/x
  3. Step 3: Cross multiply
    13,829.20x = 20,695.20 × 9,455.20
  4. Step 4: Simplify right side
    13,829.20x = 195,677,255.04
  5. Step 5: Solve for x
    x = 195,677,255.04/13,829.20
  6. Step 6: Final answer
    x = 14,149.57

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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.