Home / 13,878.20-19,150.62-7,911.20

Finding the Fourth Proportional to 13,878.20, 19,150.62 and 7,911.20

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Solution

The fourth proportional to 13,878.20, 19,150.62 and 7,911.20 is: 10,916.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.20 : 19,150.62 = 7,911.20 : x
  2. Step 2: Convert to fraction form
    13,878.20/19,150.62 = 7,911.20/x
  3. Step 3: Cross multiply
    13,878.20x = 19,150.62 × 7,911.20
  4. Step 4: Simplify right side
    13,878.20x = 151,504,384.94
  5. Step 5: Solve for x
    x = 151,504,384.94/13,878.20
  6. Step 6: Final answer
    x = 10,916.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.