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Finding the Fourth Proportional to 14,918.72, 20,584.72 and 8,871.11

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Solution

The fourth proportional to 14,918.72, 20,584.72 and 8,871.11 is: 12,240.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,918.72 : 20,584.72 = 8,871.11 : x
  2. Step 2: Convert to fraction form
    14,918.72/20,584.72 = 8,871.11/x
  3. Step 3: Cross multiply
    14,918.72x = 20,584.72 × 8,871.11
  4. Step 4: Simplify right side
    14,918.72x = 182,609,190.34
  5. Step 5: Solve for x
    x = 182,609,190.34/14,918.72
  6. Step 6: Final answer
    x = 12,240.28

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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.