Home / 5,491.60-8,242.80-2,721.40

Finding the Fourth Proportional to 5,491.60, 8,242.80 and 2,721.40

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Solution

The fourth proportional to 5,491.60, 8,242.80 and 2,721.40 is: 4,084.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,491.60 : 8,242.80 = 2,721.40 : x
  2. Step 2: Convert to fraction form
    5,491.60/8,242.80 = 2,721.40/x
  3. Step 3: Cross multiply
    5,491.60x = 8,242.80 × 2,721.40
  4. Step 4: Simplify right side
    5,491.60x = 22,431,955.92
  5. Step 5: Solve for x
    x = 22,431,955.92/5,491.60
  6. Step 6: Final answer
    x = 4,084.78

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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.