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Finding the Fourth Proportional to 9,939.60, 13,750.56 and 8,167.68

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Solution

The fourth proportional to 9,939.60, 13,750.56 and 8,167.68 is: 11,299.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.60 : 13,750.56 = 8,167.68 : x
  2. Step 2: Convert to fraction form
    9,939.60/13,750.56 = 8,167.68/x
  3. Step 3: Cross multiply
    9,939.60x = 13,750.56 × 8,167.68
  4. Step 4: Simplify right side
    9,939.60x = 112,310,173.90
  5. Step 5: Solve for x
    x = 112,310,173.90/9,939.60
  6. Step 6: Final answer
    x = 11,299.26

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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.