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Finding the Fourth Proportional to 12,199.86, 18,328.98 and 7,825.86

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Solution

The fourth proportional to 12,199.86, 18,328.98 and 7,825.86 is: 11,757.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,199.86 : 18,328.98 = 7,825.86 : x
  2. Step 2: Convert to fraction form
    12,199.86/18,328.98 = 7,825.86/x
  3. Step 3: Cross multiply
    12,199.86x = 18,328.98 × 7,825.86
  4. Step 4: Simplify right side
    12,199.86x = 143,440,031.42
  5. Step 5: Solve for x
    x = 143,440,031.42/12,199.86
  6. Step 6: Final answer
    x = 11,757.51

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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.