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Finding the Fourth Proportional to 9,917.72, 14,891.70 and 8,466.20

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Solution

The fourth proportional to 9,917.72, 14,891.70 and 8,466.20 is: 12,712.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,917.72 : 14,891.70 = 8,466.20 : x
  2. Step 2: Convert to fraction form
    9,917.72/14,891.70 = 8,466.20/x
  3. Step 3: Cross multiply
    9,917.72x = 14,891.70 × 8,466.20
  4. Step 4: Simplify right side
    9,917.72x = 126,076,110.54
  5. Step 5: Solve for x
    x = 126,076,110.54/9,917.72
  6. Step 6: Final answer
    x = 12,712.21

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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.