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Finding the Fourth Proportional to 14,615.51, 20,169.62 and 8,242.41

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Solution

The fourth proportional to 14,615.51, 20,169.62 and 8,242.41 is: 11,374.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.51 : 20,169.62 = 8,242.41 : x
  2. Step 2: Convert to fraction form
    14,615.51/20,169.62 = 8,242.41/x
  3. Step 3: Cross multiply
    14,615.51x = 20,169.62 × 8,242.41
  4. Step 4: Simplify right side
    14,615.51x = 166,246,241.05
  5. Step 5: Solve for x
    x = 166,246,241.05/14,615.51
  6. Step 6: Final answer
    x = 11,374.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.