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Finding the Fourth Proportional to 13,641.60, 20,424.30 and 7,379.22

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Solution

The fourth proportional to 13,641.60, 20,424.30 and 7,379.22 is: 11,048.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.60 : 20,424.30 = 7,379.22 : x
  2. Step 2: Convert to fraction form
    13,641.60/20,424.30 = 7,379.22/x
  3. Step 3: Cross multiply
    13,641.60x = 20,424.30 × 7,379.22
  4. Step 4: Simplify right side
    13,641.60x = 150,715,403.05
  5. Step 5: Solve for x
    x = 150,715,403.05/13,641.60
  6. Step 6: Final answer
    x = 11,048.22

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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.