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Finding the Fourth Proportional to 13,633.60, 20,421.60 and 11,329.60

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Solution

The fourth proportional to 13,633.60, 20,421.60 and 11,329.60 is: 16,970.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.60 : 20,421.60 = 11,329.60 : x
  2. Step 2: Convert to fraction form
    13,633.60/20,421.60 = 11,329.60/x
  3. Step 3: Cross multiply
    13,633.60x = 20,421.60 × 11,329.60
  4. Step 4: Simplify right side
    13,633.60x = 231,368,559.36
  5. Step 5: Solve for x
    x = 231,368,559.36/13,633.60
  6. Step 6: Final answer
    x = 16,970.47

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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.