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Finding the Fourth Proportional to 18,799.95, 28,199.19 and 7,703.97

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Solution

The fourth proportional to 18,799.95, 28,199.19 and 7,703.97 is: 11,555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799.95 : 28,199.19 = 7,703.97 : x
  2. Step 2: Convert to fraction form
    18,799.95/28,199.19 = 7,703.97/x
  3. Step 3: Cross multiply
    18,799.95x = 28,199.19 × 7,703.97
  4. Step 4: Simplify right side
    18,799.95x = 217,245,713.78
  5. Step 5: Solve for x
    x = 217,245,713.78/18,799.95
  6. Step 6: Final answer
    x = 11,555.65

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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.