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Finding the Fourth Proportional to 13,604.61, 20,404.20 and 4,243.11

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Solution

The fourth proportional to 13,604.61, 20,404.20 and 4,243.11 is: 6,363.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.61 : 20,404.20 = 4,243.11 : x
  2. Step 2: Convert to fraction form
    13,604.61/20,404.20 = 4,243.11/x
  3. Step 3: Cross multiply
    13,604.61x = 20,404.20 × 4,243.11
  4. Step 4: Simplify right side
    13,604.61x = 86,577,265.06
  5. Step 5: Solve for x
    x = 86,577,265.06/13,604.61
  6. Step 6: Final answer
    x = 6,363.82

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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.