Home / 7,869.87-11,812.10-3,977.01

Finding the Fourth Proportional to 7,869.87, 11,812.10 and 3,977.01

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Solution

The fourth proportional to 7,869.87, 11,812.10 and 3,977.01 is: 5,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.87 : 11,812.10 = 3,977.01 : x
  2. Step 2: Convert to fraction form
    7,869.87/11,812.10 = 3,977.01/x
  3. Step 3: Cross multiply
    7,869.87x = 11,812.10 × 3,977.01
  4. Step 4: Simplify right side
    7,869.87x = 46,976,819.94
  5. Step 5: Solve for x
    x = 46,976,819.94/7,869.87
  6. Step 6: Final answer
    x = 5,969.20

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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.