Home / 18,917.51-28,376.25-8,919.92

Finding the Fourth Proportional to 18,917.51, 28,376.25 and 8,919.92

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Solution

The fourth proportional to 18,917.51, 28,376.25 and 8,919.92 is: 13,379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.51 : 28,376.25 = 8,919.92 : x
  2. Step 2: Convert to fraction form
    18,917.51/28,376.25 = 8,919.92/x
  3. Step 3: Cross multiply
    18,917.51x = 28,376.25 × 8,919.92
  4. Step 4: Simplify right side
    18,917.51x = 253,113,757.77
  5. Step 5: Solve for x
    x = 253,113,757.77/18,917.51
  6. Step 6: Final answer
    x = 13,379.87

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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.