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Finding the Fourth Proportional to 13,114.60, 19,671.90 and 6,872.20

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Solution

The fourth proportional to 13,114.60, 19,671.90 and 6,872.20 is: 10,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,114.60 : 19,671.90 = 6,872.20 : x
  2. Step 2: Convert to fraction form
    13,114.60/19,671.90 = 6,872.20/x
  3. Step 3: Cross multiply
    13,114.60x = 19,671.90 × 6,872.20
  4. Step 4: Simplify right side
    13,114.60x = 135,189,231.18
  5. Step 5: Solve for x
    x = 135,189,231.18/13,114.60
  6. Step 6: Final answer
    x = 10,308.30

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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.