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Finding the Fourth Proportional to 18,998.40, 28,499.22 and 4,960.29

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Solution

The fourth proportional to 18,998.40, 28,499.22 and 4,960.29 is: 7,440.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.40 : 28,499.22 = 4,960.29 : x
  2. Step 2: Convert to fraction form
    18,998.40/28,499.22 = 4,960.29/x
  3. Step 3: Cross multiply
    18,998.40x = 28,499.22 × 4,960.29
  4. Step 4: Simplify right side
    18,998.40x = 141,364,395.97
  5. Step 5: Solve for x
    x = 141,364,395.97/18,998.40
  6. Step 6: Final answer
    x = 7,440.86

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Similar ratio
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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.