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Finding the Fourth Proportional to 10,415.10, 15,604.44 and 8,671.31

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Solution

The fourth proportional to 10,415.10, 15,604.44 and 8,671.31 is: 12,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,415.10 : 15,604.44 = 8,671.31 : x
  2. Step 2: Convert to fraction form
    10,415.10/15,604.44 = 8,671.31/x
  3. Step 3: Cross multiply
    10,415.10x = 15,604.44 × 8,671.31
  4. Step 4: Simplify right side
    10,415.10x = 135,310,858.59
  5. Step 5: Solve for x
    x = 135,310,858.59/10,415.10
  6. Step 6: Final answer
    x = 12,991.80

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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.