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Finding the Fourth Proportional to 13,470.60, 20,205.90 and 3,609.63

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Solution

The fourth proportional to 13,470.60, 20,205.90 and 3,609.63 is: 5,414.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.60 : 20,205.90 = 3,609.63 : x
  2. Step 2: Convert to fraction form
    13,470.60/20,205.90 = 3,609.63/x
  3. Step 3: Cross multiply
    13,470.60x = 20,205.90 × 3,609.63
  4. Step 4: Simplify right side
    13,470.60x = 72,935,822.82
  5. Step 5: Solve for x
    x = 72,935,822.82/13,470.60
  6. Step 6: Final answer
    x = 5,414.45

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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.