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Finding the Fourth Proportional to 18,755.89, 28,125.16 and 6,906.67

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Solution

The fourth proportional to 18,755.89, 28,125.16 and 6,906.67 is: 10,356.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.89 : 28,125.16 = 6,906.67 : x
  2. Step 2: Convert to fraction form
    18,755.89/28,125.16 = 6,906.67/x
  3. Step 3: Cross multiply
    18,755.89x = 28,125.16 × 6,906.67
  4. Step 4: Simplify right side
    18,755.89x = 194,251,111.24
  5. Step 5: Solve for x
    x = 194,251,111.24/18,755.89
  6. Step 6: Final answer
    x = 10,356.81

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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.