Home / 18,933.60-28,398.45-8,403.81

Finding the Fourth Proportional to 18,933.60, 28,398.45 and 8,403.81

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Solution

The fourth proportional to 18,933.60, 28,398.45 and 8,403.81 is: 12,604.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933.60 : 28,398.45 = 8,403.81 : x
  2. Step 2: Convert to fraction form
    18,933.60/28,398.45 = 8,403.81/x
  3. Step 3: Cross multiply
    18,933.60x = 28,398.45 × 8,403.81
  4. Step 4: Simplify right side
    18,933.60x = 238,655,178.09
  5. Step 5: Solve for x
    x = 238,655,178.09/18,933.60
  6. Step 6: Final answer
    x = 12,604.85

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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.