Home / 11,287.20-16,931.57-3,389.40

Finding the Fourth Proportional to 11,287.20, 16,931.57 and 3,389.40

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Solution

The fourth proportional to 11,287.20, 16,931.57 and 3,389.40 is: 5,084.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.20 : 16,931.57 = 3,389.40 : x
  2. Step 2: Convert to fraction form
    11,287.20/16,931.57 = 3,389.40/x
  3. Step 3: Cross multiply
    11,287.20x = 16,931.57 × 3,389.40
  4. Step 4: Simplify right side
    11,287.20x = 57,387,863.36
  5. Step 5: Solve for x
    x = 57,387,863.36/11,287.20
  6. Step 6: Final answer
    x = 5,084.33

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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.