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Finding the Fourth Proportional to 13,872.60, 19,144.20 and 9,900.60

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Solution

The fourth proportional to 13,872.60, 19,144.20 and 9,900.60 is: 13,662.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872.60 : 19,144.20 = 9,900.60 : x
  2. Step 2: Convert to fraction form
    13,872.60/19,144.20 = 9,900.60/x
  3. Step 3: Cross multiply
    13,872.60x = 19,144.20 × 9,900.60
  4. Step 4: Simplify right side
    13,872.60x = 189,539,066.52
  5. Step 5: Solve for x
    x = 189,539,066.52/13,872.60
  6. Step 6: Final answer
    x = 13,662.84

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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.