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Finding the Fourth Proportional to 18,964.83, 28,441.96 and 5,640.73

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Solution

The fourth proportional to 18,964.83, 28,441.96 and 5,640.73 is: 8,459.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.83 : 28,441.96 = 5,640.73 : x
  2. Step 2: Convert to fraction form
    18,964.83/28,441.96 = 5,640.73/x
  3. Step 3: Cross multiply
    18,964.83x = 28,441.96 × 5,640.73
  4. Step 4: Simplify right side
    18,964.83x = 160,433,417.03
  5. Step 5: Solve for x
    x = 160,433,417.03/18,964.83
  6. Step 6: Final answer
    x = 8,459.52

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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.