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Finding the Fourth Proportional to 8,475.40, 12,716.70 and 4,090.60

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Solution

The fourth proportional to 8,475.40, 12,716.70 and 4,090.60 is: 6,137.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,475.40 : 12,716.70 = 4,090.60 : x
  2. Step 2: Convert to fraction form
    8,475.40/12,716.70 = 4,090.60/x
  3. Step 3: Cross multiply
    8,475.40x = 12,716.70 × 4,090.60
  4. Step 4: Simplify right side
    8,475.40x = 52,018,933.02
  5. Step 5: Solve for x
    x = 52,018,933.02/8,475.40
  6. Step 6: Final answer
    x = 6,137.64

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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.