Home / 7,815.84-11,720.21-3,371.40

Finding the Fourth Proportional to 7,815.84, 11,720.21 and 3,371.40

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Solution

The fourth proportional to 7,815.84, 11,720.21 and 3,371.40 is: 5,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.84 : 11,720.21 = 3,371.40 : x
  2. Step 2: Convert to fraction form
    7,815.84/11,720.21 = 3,371.40/x
  3. Step 3: Cross multiply
    7,815.84x = 11,720.21 × 3,371.40
  4. Step 4: Simplify right side
    7,815.84x = 39,513,499.14
  5. Step 5: Solve for x
    x = 39,513,499.14/7,815.84
  6. Step 6: Final answer
    x = 5,055.57

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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.