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Finding the Fourth Proportional to 18,928.43, 28,392.64 and 6,449.77

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Solution

The fourth proportional to 18,928.43, 28,392.64 and 6,449.77 is: 9,674.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.43 : 28,392.64 = 6,449.77 : x
  2. Step 2: Convert to fraction form
    18,928.43/28,392.64 = 6,449.77/x
  3. Step 3: Cross multiply
    18,928.43x = 28,392.64 × 6,449.77
  4. Step 4: Simplify right side
    18,928.43x = 183,125,997.69
  5. Step 5: Solve for x
    x = 183,125,997.69/18,928.43
  6. Step 6: Final answer
    x = 9,674.65

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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.