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Finding the Fourth Proportional to 9,415.85, 14,129.10 and 8,672.27

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Solution

The fourth proportional to 9,415.85, 14,129.10 and 8,672.27 is: 13,013.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.85 : 14,129.10 = 8,672.27 : x
  2. Step 2: Convert to fraction form
    9,415.85/14,129.10 = 8,672.27/x
  3. Step 3: Cross multiply
    9,415.85x = 14,129.10 × 8,672.27
  4. Step 4: Simplify right side
    9,415.85x = 122,531,299.41
  5. Step 5: Solve for x
    x = 122,531,299.41/9,415.85
  6. Step 6: Final answer
    x = 13,013.31

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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.