Home / 8,422.94-11,621.32-5,438.90

Finding the Fourth Proportional to 8,422.94, 11,621.32 and 5,438.90

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Solution

The fourth proportional to 8,422.94, 11,621.32 and 5,438.90 is: 7,504.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.94 : 11,621.32 = 5,438.90 : x
  2. Step 2: Convert to fraction form
    8,422.94/11,621.32 = 5,438.90/x
  3. Step 3: Cross multiply
    8,422.94x = 11,621.32 × 5,438.90
  4. Step 4: Simplify right side
    8,422.94x = 63,207,125.64
  5. Step 5: Solve for x
    x = 63,207,125.64/8,422.94
  6. Step 6: Final answer
    x = 7,504.17

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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.