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Finding the Fourth Proportional to 18,655.98, 25,745.20 and 10,157.96

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Solution

The fourth proportional to 18,655.98, 25,745.20 and 10,157.96 is: 14,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.98 : 25,745.20 = 10,157.96 : x
  2. Step 2: Convert to fraction form
    18,655.98/25,745.20 = 10,157.96/x
  3. Step 3: Cross multiply
    18,655.98x = 25,745.20 × 10,157.96
  4. Step 4: Simplify right side
    18,655.98x = 261,518,711.79
  5. Step 5: Solve for x
    x = 261,518,711.79/18,655.98
  6. Step 6: Final answer
    x = 14,017.96

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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.