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Finding the Fourth Proportional to 13,604.63, 20,416.05 and 5,815.26

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Solution

The fourth proportional to 13,604.63, 20,416.05 and 5,815.26 is: 8,726.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.63 : 20,416.05 = 5,815.26 : x
  2. Step 2: Convert to fraction form
    13,604.63/20,416.05 = 5,815.26/x
  3. Step 3: Cross multiply
    13,604.63x = 20,416.05 × 5,815.26
  4. Step 4: Simplify right side
    13,604.63x = 118,724,638.92
  5. Step 5: Solve for x
    x = 118,724,638.92/13,604.63
  6. Step 6: Final answer
    x = 8,726.79

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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.