Home / 18,912.96-28,370.66-6,429.51

Finding the Fourth Proportional to 18,912.96, 28,370.66 and 6,429.51

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Solution

The fourth proportional to 18,912.96, 28,370.66 and 6,429.51 is: 9,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.96 : 28,370.66 = 6,429.51 : x
  2. Step 2: Convert to fraction form
    18,912.96/28,370.66 = 6,429.51/x
  3. Step 3: Cross multiply
    18,912.96x = 28,370.66 × 6,429.51
  4. Step 4: Simplify right side
    18,912.96x = 182,409,410.03
  5. Step 5: Solve for x
    x = 182,409,410.03/18,912.96
  6. Step 6: Final answer
    x = 9,644.68

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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.