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Finding the Fourth Proportional to 18,919.84, 28,366.74 and 6,433.96

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Solution

The fourth proportional to 18,919.84, 28,366.74 and 6,433.96 is: 9,646.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.84 : 28,366.74 = 6,433.96 : x
  2. Step 2: Convert to fraction form
    18,919.84/28,366.74 = 6,433.96/x
  3. Step 3: Cross multiply
    18,919.84x = 28,366.74 × 6,433.96
  4. Step 4: Simplify right side
    18,919.84x = 182,510,470.49
  5. Step 5: Solve for x
    x = 182,510,470.49/18,919.84
  6. Step 6: Final answer
    x = 9,646.51

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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.