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Finding the Fourth Proportional to 18,958.65, 28,441.34 and 6,475.76

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Solution

The fourth proportional to 18,958.65, 28,441.34 and 6,475.76 is: 9,714.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.65 : 28,441.34 = 6,475.76 : x
  2. Step 2: Convert to fraction form
    18,958.65/28,441.34 = 6,475.76/x
  3. Step 3: Cross multiply
    18,958.65x = 28,441.34 × 6,475.76
  4. Step 4: Simplify right side
    18,958.65x = 184,179,117.33
  5. Step 5: Solve for x
    x = 184,179,117.33/18,958.65
  6. Step 6: Final answer
    x = 9,714.78

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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.