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Finding the Fourth Proportional to 18,963.83, 28,449.08 and 6,480.92

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Solution

The fourth proportional to 18,963.83, 28,449.08 and 6,480.92 is: 9,722.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.83 : 28,449.08 = 6,480.92 : x
  2. Step 2: Convert to fraction form
    18,963.83/28,449.08 = 6,480.92/x
  3. Step 3: Cross multiply
    18,963.83x = 28,449.08 × 6,480.92
  4. Step 4: Simplify right side
    18,963.83x = 184,376,036.90
  5. Step 5: Solve for x
    x = 184,376,036.90/18,963.83
  6. Step 6: Final answer
    x = 9,722.51

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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.