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Finding the Fourth Proportional to 18,739.70, 25,860.90 and 10,241.72

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Solution

The fourth proportional to 18,739.70, 25,860.90 and 10,241.72 is: 14,133.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.70 : 25,860.90 = 10,241.72 : x
  2. Step 2: Convert to fraction form
    18,739.70/25,860.90 = 10,241.72/x
  3. Step 3: Cross multiply
    18,739.70x = 25,860.90 × 10,241.72
  4. Step 4: Simplify right side
    18,739.70x = 264,860,096.75
  5. Step 5: Solve for x
    x = 264,860,096.75/18,739.70
  6. Step 6: Final answer
    x = 14,133.64

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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.