Home / 13,277.79-19,920.09-3,917.43

Finding the Fourth Proportional to 13,277.79, 19,920.09 and 3,917.43

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Solution

The fourth proportional to 13,277.79, 19,920.09 and 3,917.43 is: 5,877.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,277.79 : 19,920.09 = 3,917.43 : x
  2. Step 2: Convert to fraction form
    13,277.79/19,920.09 = 3,917.43/x
  3. Step 3: Cross multiply
    13,277.79x = 19,920.09 × 3,917.43
  4. Step 4: Simplify right side
    13,277.79x = 78,035,572.86
  5. Step 5: Solve for x
    x = 78,035,572.86/13,277.79
  6. Step 6: Final answer
    x = 5,877.15

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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.