Home / 7,719.14-11,578.72-5,420.90

Finding the Fourth Proportional to 7,719.14, 11,578.72 and 5,420.90

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Solution

The fourth proportional to 7,719.14, 11,578.72 and 5,420.90 is: 8,131.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.14 : 11,578.72 = 5,420.90 : x
  2. Step 2: Convert to fraction form
    7,719.14/11,578.72 = 5,420.90/x
  3. Step 3: Cross multiply
    7,719.14x = 11,578.72 × 5,420.90
  4. Step 4: Simplify right side
    7,719.14x = 62,767,083.25
  5. Step 5: Solve for x
    x = 62,767,083.25/7,719.14
  6. Step 6: Final answer
    x = 8,131.36

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1.5x scale

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.