Home / 8,389.82-11,577.66-5,405.78

Finding the Fourth Proportional to 8,389.82, 11,577.66 and 5,405.78

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Solution

The fourth proportional to 8,389.82, 11,577.66 and 5,405.78 is: 7,459.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.82 : 11,577.66 = 5,405.78 : x
  2. Step 2: Convert to fraction form
    8,389.82/11,577.66 = 5,405.78/x
  3. Step 3: Cross multiply
    8,389.82x = 11,577.66 × 5,405.78
  4. Step 4: Simplify right side
    8,389.82x = 62,586,282.87
  5. Step 5: Solve for x
    x = 62,586,282.87/8,389.82
  6. Step 6: Final answer
    x = 7,459.79

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1.5x scale

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.