Home / 13,141.20-19,711.80-3,907.20

Finding the Fourth Proportional to 13,141.20, 19,711.80 and 3,907.20

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Solution

The fourth proportional to 13,141.20, 19,711.80 and 3,907.20 is: 5,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.20 : 19,711.80 = 3,907.20 : x
  2. Step 2: Convert to fraction form
    13,141.20/19,711.80 = 3,907.20/x
  3. Step 3: Cross multiply
    13,141.20x = 19,711.80 × 3,907.20
  4. Step 4: Simplify right side
    13,141.20x = 77,017,944.96
  5. Step 5: Solve for x
    x = 77,017,944.96/13,141.20
  6. Step 6: Final answer
    x = 5,860.80

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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.