Home / 18,917.89-28,378.46-4,877.79

Finding the Fourth Proportional to 18,917.89, 28,378.46 and 4,877.79

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Solution

The fourth proportional to 18,917.89, 28,378.46 and 4,877.79 is: 7,317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.89 : 28,378.46 = 4,877.79 : x
  2. Step 2: Convert to fraction form
    18,917.89/28,378.46 = 4,877.79/x
  3. Step 3: Cross multiply
    18,917.89x = 28,378.46 × 4,877.79
  4. Step 4: Simplify right side
    18,917.89x = 138,424,180.60
  5. Step 5: Solve for x
    x = 138,424,180.60/18,917.89
  6. Step 6: Final answer
    x = 7,317.11

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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.